Home / 28,380.06-42,569.96-8,658.55

Finding the Fourth Proportional to 28,380.06, 42,569.96 and 8,658.55

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Solution

The fourth proportional to 28,380.06, 42,569.96 and 8,658.55 is: 12,987.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,380.06 : 42,569.96 = 8,658.55 : x
  2. Step 2: Convert to fraction form
    28,380.06/42,569.96 = 8,658.55/x
  3. Step 3: Cross multiply
    28,380.06x = 42,569.96 × 8,658.55
  4. Step 4: Simplify right side
    28,380.06x = 368,593,935.95
  5. Step 5: Solve for x
    x = 368,593,935.95/28,380.06
  6. Step 6: Final answer
    x = 12,987.78

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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.