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Finding the Fourth Proportional to 13,892.10, 20,839.05 and 7,331.10

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Solution

The fourth proportional to 13,892.10, 20,839.05 and 7,331.10 is: 10,997.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,892.10 : 20,839.05 = 7,331.10 : x
  2. Step 2: Convert to fraction form
    13,892.10/20,839.05 = 7,331.10/x
  3. Step 3: Cross multiply
    13,892.10x = 20,839.05 × 7,331.10
  4. Step 4: Simplify right side
    13,892.10x = 152,773,159.46
  5. Step 5: Solve for x
    x = 152,773,159.46/13,892.10
  6. Step 6: Final answer
    x = 10,997.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.