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Finding the Fourth Proportional to 57,891.20, 86,841.60 and 18,447.20

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Solution

The fourth proportional to 57,891.20, 86,841.60 and 18,447.20 is: 27,672.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,891.20 : 86,841.60 = 18,447.20 : x
  2. Step 2: Convert to fraction form
    57,891.20/86,841.60 = 18,447.20/x
  3. Step 3: Cross multiply
    57,891.20x = 86,841.60 × 18,447.20
  4. Step 4: Simplify right side
    57,891.20x = 1,601,984,363.52
  5. Step 5: Solve for x
    x = 1,601,984,363.52/57,891.20
  6. Step 6: Final answer
    x = 27,672.33

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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.