Home / 20,740.91-31,111.49-5,158.53

Finding the Fourth Proportional to 20,740.91, 31,111.49 and 5,158.53

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Solution

The fourth proportional to 20,740.91, 31,111.49 and 5,158.53 is: 7,737.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.91 : 31,111.49 = 5,158.53 : x
  2. Step 2: Convert to fraction form
    20,740.91/31,111.49 = 5,158.53/x
  3. Step 3: Cross multiply
    20,740.91x = 31,111.49 × 5,158.53
  4. Step 4: Simplify right side
    20,740.91x = 160,489,664.73
  5. Step 5: Solve for x
    x = 160,489,664.73/20,740.91
  6. Step 6: Final answer
    x = 7,737.83

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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.