Home / 22,818.60-31,489.68-13,387.20

Finding the Fourth Proportional to 22,818.60, 31,489.68 and 13,387.20

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Solution

The fourth proportional to 22,818.60, 31,489.68 and 13,387.20 is: 18,474.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,818.60 : 31,489.68 = 13,387.20 : x
  2. Step 2: Convert to fraction form
    22,818.60/31,489.68 = 13,387.20/x
  3. Step 3: Cross multiply
    22,818.60x = 31,489.68 × 13,387.20
  4. Step 4: Simplify right side
    22,818.60x = 421,558,644.10
  5. Step 5: Solve for x
    x = 421,558,644.10/22,818.60
  6. Step 6: Final answer
    x = 18,474.34

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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.