Home / 13,137.19-18,127.51-7,472.23

Finding the Fourth Proportional to 13,137.19, 18,127.51 and 7,472.23

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Solution

The fourth proportional to 13,137.19, 18,127.51 and 7,472.23 is: 10,310.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.19 : 18,127.51 = 7,472.23 : x
  2. Step 2: Convert to fraction form
    13,137.19/18,127.51 = 7,472.23/x
  3. Step 3: Cross multiply
    13,137.19x = 18,127.51 × 7,472.23
  4. Step 4: Simplify right side
    13,137.19x = 135,452,924.05
  5. Step 5: Solve for x
    x = 135,452,924.05/13,137.19
  6. Step 6: Final answer
    x = 10,310.65

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Half scale
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Double scale
Find fourth proportional to 13,138.19, 18,128.89 and 7,473.23
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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.