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Finding the Fourth Proportional to 11,372.78, 15,664.08 and 9,882.38

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Solution

The fourth proportional to 11,372.78, 15,664.08 and 9,882.38 is: 13,611.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,372.78 : 15,664.08 = 9,882.38 : x
  2. Step 2: Convert to fraction form
    11,372.78/15,664.08 = 9,882.38/x
  3. Step 3: Cross multiply
    11,372.78x = 15,664.08 × 9,882.38
  4. Step 4: Simplify right side
    11,372.78x = 154,798,390.91
  5. Step 5: Solve for x
    x = 154,798,390.91/11,372.78
  6. Step 6: Final answer
    x = 13,611.31

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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.