Home / 13,122.75-18,112.28-8,157.63

Finding the Fourth Proportional to 13,122.75, 18,112.28 and 8,157.63

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Solution

The fourth proportional to 13,122.75, 18,112.28 and 8,157.63 is: 11,259.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,122.75 : 18,112.28 = 8,157.63 : x
  2. Step 2: Convert to fraction form
    13,122.75/18,112.28 = 8,157.63/x
  3. Step 3: Cross multiply
    13,122.75x = 18,112.28 × 8,157.63
  4. Step 4: Simplify right side
    13,122.75x = 147,753,237.91
  5. Step 5: Solve for x
    x = 147,753,237.91/13,122.75
  6. Step 6: Final answer
    x = 11,259.32

Related Problems

Find fourth proportional to 6,561.38, 9,056.14 and 4,078.82
Half scale
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Double scale
Find fourth proportional to 13,123.75, 18,113.66 and 8,158.63
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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.