Home / 21,439.38-29,581.26-12,481.50

Finding the Fourth Proportional to 21,439.38, 29,581.26 and 12,481.50

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Solution

The fourth proportional to 21,439.38, 29,581.26 and 12,481.50 is: 17,221.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,439.38 : 29,581.26 = 12,481.50 : x
  2. Step 2: Convert to fraction form
    21,439.38/29,581.26 = 12,481.50/x
  3. Step 3: Cross multiply
    21,439.38x = 29,581.26 × 12,481.50
  4. Step 4: Simplify right side
    21,439.38x = 369,218,496.69
  5. Step 5: Solve for x
    x = 369,218,496.69/21,439.38
  6. Step 6: Final answer
    x = 17,221.51

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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.