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Finding the Fourth Proportional to 21,472.76, 29,617.42 and 20,750.24

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Solution

The fourth proportional to 21,472.76, 29,617.42 and 20,750.24 is: 28,620.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,472.76 : 29,617.42 = 20,750.24 : x
  2. Step 2: Convert to fraction form
    21,472.76/29,617.42 = 20,750.24/x
  3. Step 3: Cross multiply
    21,472.76x = 29,617.42 × 20,750.24
  4. Step 4: Simplify right side
    21,472.76x = 614,568,573.18
  5. Step 5: Solve for x
    x = 614,568,573.18/21,472.76
  6. Step 6: Final answer
    x = 28,620.85

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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.