Home / 20,129.70-27,748.50-14,151.90

Finding the Fourth Proportional to 20,129.70, 27,748.50 and 14,151.90

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Solution

The fourth proportional to 20,129.70, 27,748.50 and 14,151.90 is: 19,508.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.70 : 27,748.50 = 14,151.90 : x
  2. Step 2: Convert to fraction form
    20,129.70/27,748.50 = 14,151.90/x
  3. Step 3: Cross multiply
    20,129.70x = 27,748.50 × 14,151.90
  4. Step 4: Simplify right side
    20,129.70x = 392,693,997.15
  5. Step 5: Solve for x
    x = 392,693,997.15/20,129.70
  6. Step 6: Final answer
    x = 19,508.19

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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.