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Finding the Fourth Proportional to 28,377.61, 42,566.45 and 8,655.12

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Solution

The fourth proportional to 28,377.61, 42,566.45 and 8,655.12 is: 12,982.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,377.61 : 42,566.45 = 8,655.12 : x
  2. Step 2: Convert to fraction form
    28,377.61/42,566.45 = 8,655.12/x
  3. Step 3: Cross multiply
    28,377.61x = 42,566.45 × 8,655.12
  4. Step 4: Simplify right side
    28,377.61x = 368,417,689.45
  5. Step 5: Solve for x
    x = 368,417,689.45/28,377.61
  6. Step 6: Final answer
    x = 12,982.69

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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.