Home / 15,387.34-21,234.54-8,313.76

Finding the Fourth Proportional to 15,387.34, 21,234.54 and 8,313.76

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Solution

The fourth proportional to 15,387.34, 21,234.54 and 8,313.76 is: 11,472.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,387.34 : 21,234.54 = 8,313.76 : x
  2. Step 2: Convert to fraction form
    15,387.34/21,234.54 = 8,313.76/x
  3. Step 3: Cross multiply
    15,387.34x = 21,234.54 × 8,313.76
  4. Step 4: Simplify right side
    15,387.34x = 176,538,869.27
  5. Step 5: Solve for x
    x = 176,538,869.27/15,387.34
  6. Step 6: Final answer
    x = 11,472.99

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Double scale
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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.