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Finding the Fourth Proportional to 28,517.50, 42,793.53 and 12,101.50

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Solution

The fourth proportional to 28,517.50, 42,793.53 and 12,101.50 is: 18,159.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,517.50 : 42,793.53 = 12,101.50 : x
  2. Step 2: Convert to fraction form
    28,517.50/42,793.53 = 12,101.50/x
  3. Step 3: Cross multiply
    28,517.50x = 42,793.53 × 12,101.50
  4. Step 4: Simplify right side
    28,517.50x = 517,865,903.30
  5. Step 5: Solve for x
    x = 517,865,903.30/28,517.50
  6. Step 6: Final answer
    x = 18,159.58

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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.