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Finding the Fourth Proportional to 28,377.30, 42,565.84 and 8,655.80

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Solution

The fourth proportional to 28,377.30, 42,565.84 and 8,655.80 is: 12,983.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,377.30 : 42,565.84 = 8,655.80 : x
  2. Step 2: Convert to fraction form
    28,377.30/42,565.84 = 8,655.80/x
  3. Step 3: Cross multiply
    28,377.30x = 42,565.84 × 8,655.80
  4. Step 4: Simplify right side
    28,377.30x = 368,441,163.40
  5. Step 5: Solve for x
    x = 368,441,163.40/28,377.30
  6. Step 6: Final answer
    x = 12,983.66

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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.