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Finding the Fourth Proportional to 15,139.10, 20,892.44 and 9,472.03

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Solution

The fourth proportional to 15,139.10, 20,892.44 and 9,472.03 is: 13,071.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,139.10 : 20,892.44 = 9,472.03 : x
  2. Step 2: Convert to fraction form
    15,139.10/20,892.44 = 9,472.03/x
  3. Step 3: Cross multiply
    15,139.10x = 20,892.44 × 9,472.03
  4. Step 4: Simplify right side
    15,139.10x = 197,893,818.45
  5. Step 5: Solve for x
    x = 197,893,818.45/15,139.10
  6. Step 6: Final answer
    x = 13,071.70

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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.