Home / 21,500.43-29,670.09-11,939.76

Finding the Fourth Proportional to 21,500.43, 29,670.09 and 11,939.76

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Solution

The fourth proportional to 21,500.43, 29,670.09 and 11,939.76 is: 16,476.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,500.43 : 29,670.09 = 11,939.76 : x
  2. Step 2: Convert to fraction form
    21,500.43/29,670.09 = 11,939.76/x
  3. Step 3: Cross multiply
    21,500.43x = 29,670.09 × 11,939.76
  4. Step 4: Simplify right side
    21,500.43x = 354,253,753.78
  5. Step 5: Solve for x
    x = 354,253,753.78/21,500.43
  6. Step 6: Final answer
    x = 16,476.59

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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.