Home / 20,423.31-28,184.85-11,472.39

Finding the Fourth Proportional to 20,423.31, 28,184.85 and 11,472.39

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Solution

The fourth proportional to 20,423.31, 28,184.85 and 11,472.39 is: 15,832.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,423.31 : 28,184.85 = 11,472.39 : x
  2. Step 2: Convert to fraction form
    20,423.31/28,184.85 = 11,472.39/x
  3. Step 3: Cross multiply
    20,423.31x = 28,184.85 × 11,472.39
  4. Step 4: Simplify right side
    20,423.31x = 323,347,591.29
  5. Step 5: Solve for x
    x = 323,347,591.29/20,423.31
  6. Step 6: Final answer
    x = 15,832.28

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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.