Home / 21,282.29-29,372.82-12,789.14

Finding the Fourth Proportional to 21,282.29, 29,372.82 and 12,789.14

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Solution

The fourth proportional to 21,282.29, 29,372.82 and 12,789.14 is: 17,650.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,282.29 : 29,372.82 = 12,789.14 : x
  2. Step 2: Convert to fraction form
    21,282.29/29,372.82 = 12,789.14/x
  3. Step 3: Cross multiply
    21,282.29x = 29,372.82 × 12,789.14
  4. Step 4: Simplify right side
    21,282.29x = 375,653,107.17
  5. Step 5: Solve for x
    x = 375,653,107.17/21,282.29
  6. Step 6: Final answer
    x = 17,650.97

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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.