Home / 15,420.52-21,279.54-9,134.92

Finding the Fourth Proportional to 15,420.52, 21,279.54 and 9,134.92

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Solution

The fourth proportional to 15,420.52, 21,279.54 and 9,134.92 is: 12,605.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,420.52 : 21,279.54 = 9,134.92 : x
  2. Step 2: Convert to fraction form
    15,420.52/21,279.54 = 9,134.92/x
  3. Step 3: Cross multiply
    15,420.52x = 21,279.54 × 9,134.92
  4. Step 4: Simplify right side
    15,420.52x = 194,386,895.54
  5. Step 5: Solve for x
    x = 194,386,895.54/15,420.52
  6. Step 6: Final answer
    x = 12,605.73

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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.