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Finding the Fourth Proportional to 21,575.62, 29,773.62 and 12,142.36

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Solution

The fourth proportional to 21,575.62, 29,773.62 and 12,142.36 is: 16,756.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,575.62 : 29,773.62 = 12,142.36 : x
  2. Step 2: Convert to fraction form
    21,575.62/29,773.62 = 12,142.36/x
  3. Step 3: Cross multiply
    21,575.62x = 29,773.62 × 12,142.36
  4. Step 4: Simplify right side
    21,575.62x = 361,522,012.54
  5. Step 5: Solve for x
    x = 361,522,012.54/21,575.62
  6. Step 6: Final answer
    x = 16,756.04

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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.