Home / 20,758.61-31,143.86-10,231.77

Finding the Fourth Proportional to 20,758.61, 31,143.86 and 10,231.77

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Solution

The fourth proportional to 20,758.61, 31,143.86 and 10,231.77 is: 15,350.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,758.61 : 31,143.86 = 10,231.77 : x
  2. Step 2: Convert to fraction form
    20,758.61/31,143.86 = 10,231.77/x
  3. Step 3: Cross multiply
    20,758.61x = 31,143.86 × 10,231.77
  4. Step 4: Simplify right side
    20,758.61x = 318,656,761.27
  5. Step 5: Solve for x
    x = 318,656,761.27/20,758.61
  6. Step 6: Final answer
    x = 15,350.59

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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.