Home / 20,881.71-31,321.17-9,790.83

Finding the Fourth Proportional to 20,881.71, 31,321.17 and 9,790.83

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Solution

The fourth proportional to 20,881.71, 31,321.17 and 9,790.83 is: 14,685.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.71 : 31,321.17 = 9,790.83 : x
  2. Step 2: Convert to fraction form
    20,881.71/31,321.17 = 9,790.83/x
  3. Step 3: Cross multiply
    20,881.71x = 31,321.17 × 9,790.83
  4. Step 4: Simplify right side
    20,881.71x = 306,660,250.87
  5. Step 5: Solve for x
    x = 306,660,250.87/20,881.71
  6. Step 6: Final answer
    x = 14,685.59

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1.5x scale

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.