Home / 21,057.12-29,046.24-12,672

Finding the Fourth Proportional to 21,057.12, 29,046.24 and 12,672

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Solution

The fourth proportional to 21,057.12, 29,046.24 and 12,672 is: 17,479.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,057.12 : 29,046.24 = 12,672 : x
  2. Step 2: Convert to fraction form
    21,057.12/29,046.24 = 12,672/x
  3. Step 3: Cross multiply
    21,057.12x = 29,046.24 × 12,672
  4. Step 4: Simplify right side
    21,057.12x = 368,073,953.28
  5. Step 5: Solve for x
    x = 368,073,953.28/21,057.12
  6. Step 6: Final answer
    x = 17,479.79

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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.