Home / 15,387.38-21,234.52-8,313.78

Finding the Fourth Proportional to 15,387.38, 21,234.52 and 8,313.78

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Solution

The fourth proportional to 15,387.38, 21,234.52 and 8,313.78 is: 11,472.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,387.38 : 21,234.52 = 8,313.78 : x
  2. Step 2: Convert to fraction form
    15,387.38/21,234.52 = 8,313.78/x
  3. Step 3: Cross multiply
    15,387.38x = 21,234.52 × 8,313.78
  4. Step 4: Simplify right side
    15,387.38x = 176,539,127.69
  5. Step 5: Solve for x
    x = 176,539,127.69/15,387.38
  6. Step 6: Final answer
    x = 11,472.98

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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.