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Finding the Fourth Proportional to 15,687.78, 23,531.69 and 6,679.56

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Solution

The fourth proportional to 15,687.78, 23,531.69 and 6,679.56 is: 10,019.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,687.78 : 23,531.69 = 6,679.56 : x
  2. Step 2: Convert to fraction form
    15,687.78/23,531.69 = 6,679.56/x
  3. Step 3: Cross multiply
    15,687.78x = 23,531.69 × 6,679.56
  4. Step 4: Simplify right side
    15,687.78x = 157,181,335.26
  5. Step 5: Solve for x
    x = 157,181,335.26/15,687.78
  6. Step 6: Final answer
    x = 10,019.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.