Home / 21,248.22-29,322-11,687.61

Finding the Fourth Proportional to 21,248.22, 29,322 and 11,687.61

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Solution

The fourth proportional to 21,248.22, 29,322 and 11,687.61 is: 16,128.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,248.22 : 29,322 = 11,687.61 : x
  2. Step 2: Convert to fraction form
    21,248.22/29,322 = 11,687.61/x
  3. Step 3: Cross multiply
    21,248.22x = 29,322 × 11,687.61
  4. Step 4: Simplify right side
    21,248.22x = 342,704,100.42
  5. Step 5: Solve for x
    x = 342,704,100.42/21,248.22
  6. Step 6: Final answer
    x = 16,128.60

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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.