Home / 21,499.38-29,668.16-11,939.88

Finding the Fourth Proportional to 21,499.38, 29,668.16 and 11,939.88

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Solution

The fourth proportional to 21,499.38, 29,668.16 and 11,939.88 is: 16,476.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,499.38 : 29,668.16 = 11,939.88 : x
  2. Step 2: Convert to fraction form
    21,499.38/29,668.16 = 11,939.88/x
  3. Step 3: Cross multiply
    21,499.38x = 29,668.16 × 11,939.88
  4. Step 4: Simplify right side
    21,499.38x = 354,234,210.52
  5. Step 5: Solve for x
    x = 354,234,210.52/21,499.38
  6. Step 6: Final answer
    x = 16,476.48

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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.