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Finding the Fourth Proportional to 18,531.88, 25,572.23 and 10,978.22

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Solution

The fourth proportional to 18,531.88, 25,572.23 and 10,978.22 is: 15,148.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,531.88 : 25,572.23 = 10,978.22 : x
  2. Step 2: Convert to fraction form
    18,531.88/25,572.23 = 10,978.22/x
  3. Step 3: Cross multiply
    18,531.88x = 25,572.23 × 10,978.22
  4. Step 4: Simplify right side
    18,531.88x = 280,737,617.04
  5. Step 5: Solve for x
    x = 280,737,617.04/18,531.88
  6. Step 6: Final answer
    x = 15,148.90

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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.