Home / 28,103.73-42,169.38-12,306.61

Finding the Fourth Proportional to 28,103.73, 42,169.38 and 12,306.61

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Solution

The fourth proportional to 28,103.73, 42,169.38 and 12,306.61 is: 18,465.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,103.73 : 42,169.38 = 12,306.61 : x
  2. Step 2: Convert to fraction form
    28,103.73/42,169.38 = 12,306.61/x
  3. Step 3: Cross multiply
    28,103.73x = 42,169.38 × 12,306.61
  4. Step 4: Simplify right side
    28,103.73x = 518,962,113.60
  5. Step 5: Solve for x
    x = 518,962,113.60/28,103.73
  6. Step 6: Final answer
    x = 18,465.95

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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.