Home / 28,380.97-42,572.19-8,659.47

Finding the Fourth Proportional to 28,380.97, 42,572.19 and 8,659.47

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Solution

The fourth proportional to 28,380.97, 42,572.19 and 8,659.47 is: 12,989.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,380.97 : 42,572.19 = 8,659.47 : x
  2. Step 2: Convert to fraction form
    28,380.97/42,572.19 = 8,659.47/x
  3. Step 3: Cross multiply
    28,380.97x = 42,572.19 × 8,659.47
  4. Step 4: Simplify right side
    28,380.97x = 368,652,602.14
  5. Step 5: Solve for x
    x = 368,652,602.14/28,380.97
  6. Step 6: Final answer
    x = 12,989.43

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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.