Home / 13,137.96-18,128.90-7,550.76

Finding the Fourth Proportional to 13,137.96, 18,128.90 and 7,550.76

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Solution

The fourth proportional to 13,137.96, 18,128.90 and 7,550.76 is: 10,419.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.96 : 18,128.90 = 7,550.76 : x
  2. Step 2: Convert to fraction form
    13,137.96/18,128.90 = 7,550.76/x
  3. Step 3: Cross multiply
    13,137.96x = 18,128.90 × 7,550.76
  4. Step 4: Simplify right side
    13,137.96x = 136,886,972.96
  5. Step 5: Solve for x
    x = 136,886,972.96/13,137.96
  6. Step 6: Final answer
    x = 10,419.20

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Find fourth proportional to 6,568.98, 9,064.45 and 3,775.38
Half scale
Find fourth proportional to 26,275.92, 36,257.80 and 15,101.52
Double scale
Find fourth proportional to 13,138.96, 18,130.28 and 7,551.76
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.