Home / 28,379.97-42,572.18-8,658.70

Finding the Fourth Proportional to 28,379.97, 42,572.18 and 8,658.70

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Solution

The fourth proportional to 28,379.97, 42,572.18 and 8,658.70 is: 12,988.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,379.97 : 42,572.18 = 8,658.70 : x
  2. Step 2: Convert to fraction form
    28,379.97/42,572.18 = 8,658.70/x
  3. Step 3: Cross multiply
    28,379.97x = 42,572.18 × 8,658.70
  4. Step 4: Simplify right side
    28,379.97x = 368,619,650.18
  5. Step 5: Solve for x
    x = 368,619,650.18/28,379.97
  6. Step 6: Final answer
    x = 12,988.73

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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.