Home / 15,387.29-21,234.46-8,313.71

Finding the Fourth Proportional to 15,387.29, 21,234.46 and 8,313.71

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Solution

The fourth proportional to 15,387.29, 21,234.46 and 8,313.71 is: 11,472.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,387.29 : 21,234.46 = 8,313.71 : x
  2. Step 2: Convert to fraction form
    15,387.29/21,234.46 = 8,313.71/x
  3. Step 3: Cross multiply
    15,387.29x = 21,234.46 × 8,313.71
  4. Step 4: Simplify right side
    15,387.29x = 176,537,142.45
  5. Step 5: Solve for x
    x = 176,537,142.45/15,387.29
  6. Step 6: Final answer
    x = 11,472.92

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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.