Home / 20,663.30-28,515.65-11,231.87

Finding the Fourth Proportional to 20,663.30, 28,515.65 and 11,231.87

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Solution

The fourth proportional to 20,663.30, 28,515.65 and 11,231.87 is: 15,500.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,663.30 : 28,515.65 = 11,231.87 : x
  2. Step 2: Convert to fraction form
    20,663.30/28,515.65 = 11,231.87/x
  3. Step 3: Cross multiply
    20,663.30x = 28,515.65 × 11,231.87
  4. Step 4: Simplify right side
    20,663.30x = 320,283,875.03
  5. Step 5: Solve for x
    x = 320,283,875.03/20,663.30
  6. Step 6: Final answer
    x = 15,500.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.