Home / 12,521.08-17,278.98-7,215.78

Finding the Fourth Proportional to 12,521.08, 17,278.98 and 7,215.78

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Solution

The fourth proportional to 12,521.08, 17,278.98 and 7,215.78 is: 9,957.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,521.08 : 17,278.98 = 7,215.78 : x
  2. Step 2: Convert to fraction form
    12,521.08/17,278.98 = 7,215.78/x
  3. Step 3: Cross multiply
    12,521.08x = 17,278.98 × 7,215.78
  4. Step 4: Simplify right side
    12,521.08x = 124,681,318.30
  5. Step 5: Solve for x
    x = 124,681,318.30/12,521.08
  6. Step 6: Final answer
    x = 9,957.71

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Similar ratio
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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.