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Finding the Fourth Proportional to 21,751.26, 29,974.70 and 15,452.70

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Solution

The fourth proportional to 21,751.26, 29,974.70 and 15,452.70 is: 21,294.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,751.26 : 29,974.70 = 15,452.70 : x
  2. Step 2: Convert to fraction form
    21,751.26/29,974.70 = 15,452.70/x
  3. Step 3: Cross multiply
    21,751.26x = 29,974.70 × 15,452.70
  4. Step 4: Simplify right side
    21,751.26x = 463,190,046.69
  5. Step 5: Solve for x
    x = 463,190,046.69/21,751.26
  6. Step 6: Final answer
    x = 21,294.86

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1.5x scale

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.