Home / 20,996.55-28,975.23-11,565

Finding the Fourth Proportional to 20,996.55, 28,975.23 and 11,565

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Solution

The fourth proportional to 20,996.55, 28,975.23 and 11,565 is: 15,959.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,996.55 : 28,975.23 = 11,565 : x
  2. Step 2: Convert to fraction form
    20,996.55/28,975.23 = 11,565/x
  3. Step 3: Cross multiply
    20,996.55x = 28,975.23 × 11,565
  4. Step 4: Simplify right side
    20,996.55x = 335,098,534.95
  5. Step 5: Solve for x
    x = 335,098,534.95/20,996.55
  6. Step 6: Final answer
    x = 15,959.70

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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.