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Finding the Fourth Proportional to 28,375.72, 42,572.22 and 16,664.20

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Solution

The fourth proportional to 28,375.72, 42,572.22 and 16,664.20 is: 25,001.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,375.72 : 42,572.22 = 16,664.20 : x
  2. Step 2: Convert to fraction form
    28,375.72/42,572.22 = 16,664.20/x
  3. Step 3: Cross multiply
    28,375.72x = 42,572.22 × 16,664.20
  4. Step 4: Simplify right side
    28,375.72x = 709,431,988.52
  5. Step 5: Solve for x
    x = 709,431,988.52/28,375.72
  6. Step 6: Final answer
    x = 25,001.37

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1.5x scale

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.