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Finding the Fourth Proportional to 21,294.84, 29,387.22 and 11,863.42

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Solution

The fourth proportional to 21,294.84, 29,387.22 and 11,863.42 is: 16,371.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,294.84 : 29,387.22 = 11,863.42 : x
  2. Step 2: Convert to fraction form
    21,294.84/29,387.22 = 11,863.42/x
  3. Step 3: Cross multiply
    21,294.84x = 29,387.22 × 11,863.42
  4. Step 4: Simplify right side
    21,294.84x = 348,632,933.49
  5. Step 5: Solve for x
    x = 348,632,933.49/21,294.84
  6. Step 6: Final answer
    x = 16,371.71

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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.