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Finding the Fourth Proportional to 28,375.60, 42,570.30 and 8,654.56

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Solution

The fourth proportional to 28,375.60, 42,570.30 and 8,654.56 is: 12,983.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,375.60 : 42,570.30 = 8,654.56 : x
  2. Step 2: Convert to fraction form
    28,375.60/42,570.30 = 8,654.56/x
  3. Step 3: Cross multiply
    28,375.60x = 42,570.30 × 8,654.56
  4. Step 4: Simplify right side
    28,375.60x = 368,427,215.57
  5. Step 5: Solve for x
    x = 368,427,215.57/28,375.60
  6. Step 6: Final answer
    x = 12,983.94

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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.