Home / 20,723.67-31,085.19-5,141.30

Finding the Fourth Proportional to 20,723.67, 31,085.19 and 5,141.30

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Solution

The fourth proportional to 20,723.67, 31,085.19 and 5,141.30 is: 7,711.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,723.67 : 31,085.19 = 5,141.30 : x
  2. Step 2: Convert to fraction form
    20,723.67/31,085.19 = 5,141.30/x
  3. Step 3: Cross multiply
    20,723.67x = 31,085.19 × 5,141.30
  4. Step 4: Simplify right side
    20,723.67x = 159,818,287.35
  5. Step 5: Solve for x
    x = 159,818,287.35/20,723.67
  6. Step 6: Final answer
    x = 7,711.87

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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.