Home / 15,451.38-21,323.12-8,377.76

Finding the Fourth Proportional to 15,451.38, 21,323.12 and 8,377.76

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Solution

The fourth proportional to 15,451.38, 21,323.12 and 8,377.76 is: 11,561.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,451.38 : 21,323.12 = 8,377.76 : x
  2. Step 2: Convert to fraction form
    15,451.38/21,323.12 = 8,377.76/x
  3. Step 3: Cross multiply
    15,451.38x = 21,323.12 × 8,377.76
  4. Step 4: Simplify right side
    15,451.38x = 178,639,993.23
  5. Step 5: Solve for x
    x = 178,639,993.23/15,451.38
  6. Step 6: Final answer
    x = 11,561.43

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Half scale
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Double scale
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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.