Home / 20,740.19-31,092.87-8,269.43

Finding the Fourth Proportional to 20,740.19, 31,092.87 and 8,269.43

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Solution

The fourth proportional to 20,740.19, 31,092.87 and 8,269.43 is: 12,397.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.19 : 31,092.87 = 8,269.43 : x
  2. Step 2: Convert to fraction form
    20,740.19/31,092.87 = 8,269.43/x
  3. Step 3: Cross multiply
    20,740.19x = 31,092.87 × 8,269.43
  4. Step 4: Simplify right side
    20,740.19x = 257,120,311.96
  5. Step 5: Solve for x
    x = 257,120,311.96/20,740.19
  6. Step 6: Final answer
    x = 12,397.20

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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.