Home / 20,972.25-28,941.71-11,540.61

Finding the Fourth Proportional to 20,972.25, 28,941.71 and 11,540.61

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Solution

The fourth proportional to 20,972.25, 28,941.71 and 11,540.61 is: 15,926.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.25 : 28,941.71 = 11,540.61 : x
  2. Step 2: Convert to fraction form
    20,972.25/28,941.71 = 11,540.61/x
  3. Step 3: Cross multiply
    20,972.25x = 28,941.71 × 11,540.61
  4. Step 4: Simplify right side
    20,972.25x = 334,004,930.14
  5. Step 5: Solve for x
    x = 334,004,930.14/20,972.25
  6. Step 6: Final answer
    x = 15,926.04

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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.