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Finding the Fourth Proportional to 34,456.50, 51,684.96 and 13,680

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Solution

The fourth proportional to 34,456.50, 51,684.96 and 13,680 is: 20,520.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,456.50 : 51,684.96 = 13,680 : x
  2. Step 2: Convert to fraction form
    34,456.50/51,684.96 = 13,680/x
  3. Step 3: Cross multiply
    34,456.50x = 51,684.96 × 13,680
  4. Step 4: Simplify right side
    34,456.50x = 707,050,252.80
  5. Step 5: Solve for x
    x = 707,050,252.80/34,456.50
  6. Step 6: Final answer
    x = 20,520.08

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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.