Home / 20,917.92-31,387.56-13,902.72

Finding the Fourth Proportional to 20,917.92, 31,387.56 and 13,902.72

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Solution

The fourth proportional to 20,917.92, 31,387.56 and 13,902.72 is: 20,861.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.92 : 31,387.56 = 13,902.72 : x
  2. Step 2: Convert to fraction form
    20,917.92/31,387.56 = 13,902.72/x
  3. Step 3: Cross multiply
    20,917.92x = 31,387.56 × 13,902.72
  4. Step 4: Simplify right side
    20,917.92x = 436,372,458.16
  5. Step 5: Solve for x
    x = 436,372,458.16/20,917.92
  6. Step 6: Final answer
    x = 20,861.18

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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.