Home / 20,869.68-31,303.44-5,287.44

Finding the Fourth Proportional to 20,869.68, 31,303.44 and 5,287.44

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Solution

The fourth proportional to 20,869.68, 31,303.44 and 5,287.44 is: 7,930.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.68 : 31,303.44 = 5,287.44 : x
  2. Step 2: Convert to fraction form
    20,869.68/31,303.44 = 5,287.44/x
  3. Step 3: Cross multiply
    20,869.68x = 31,303.44 × 5,287.44
  4. Step 4: Simplify right side
    20,869.68x = 165,515,060.79
  5. Step 5: Solve for x
    x = 165,515,060.79/20,869.68
  6. Step 6: Final answer
    x = 7,930.89

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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.