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Finding the Fourth Proportional to 28,469.80, 42,704.70 and 25,456.60

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Solution

The fourth proportional to 28,469.80, 42,704.70 and 25,456.60 is: 38,184.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,469.80 : 42,704.70 = 25,456.60 : x
  2. Step 2: Convert to fraction form
    28,469.80/42,704.70 = 25,456.60/x
  3. Step 3: Cross multiply
    28,469.80x = 42,704.70 × 25,456.60
  4. Step 4: Simplify right side
    28,469.80x = 1,087,116,466.02
  5. Step 5: Solve for x
    x = 1,087,116,466.02/28,469.80
  6. Step 6: Final answer
    x = 38,184.90

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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.