Home / 21,489.43-29,654.97-11,928.76

Finding the Fourth Proportional to 21,489.43, 29,654.97 and 11,928.76

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Solution

The fourth proportional to 21,489.43, 29,654.97 and 11,928.76 is: 16,461.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,489.43 : 29,654.97 = 11,928.76 : x
  2. Step 2: Convert to fraction form
    21,489.43/29,654.97 = 11,928.76/x
  3. Step 3: Cross multiply
    21,489.43x = 29,654.97 × 11,928.76
  4. Step 4: Simplify right side
    21,489.43x = 353,747,019.94
  5. Step 5: Solve for x
    x = 353,747,019.94/21,489.43
  6. Step 6: Final answer
    x = 16,461.44

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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.