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Finding the Fourth Proportional to 31,328, 43,237.76 and 18,087.68

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Solution

The fourth proportional to 31,328, 43,237.76 and 18,087.68 is: 24,963.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,328 : 43,237.76 = 18,087.68 : x
  2. Step 2: Convert to fraction form
    31,328/43,237.76 = 18,087.68/x
  3. Step 3: Cross multiply
    31,328x = 43,237.76 × 18,087.68
  4. Step 4: Simplify right side
    31,328x = 782,070,766.80
  5. Step 5: Solve for x
    x = 782,070,766.80/31,328
  6. Step 6: Final answer
    x = 24,963.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.