Home / 19,990.38-29,975.45-11,672.49

Finding the Fourth Proportional to 19,990.38, 29,975.45 and 11,672.49

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Solution

The fourth proportional to 19,990.38, 29,975.45 and 11,672.49 is: 17,502.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,990.38 : 29,975.45 = 11,672.49 : x
  2. Step 2: Convert to fraction form
    19,990.38/29,975.45 = 11,672.49/x
  3. Step 3: Cross multiply
    19,990.38x = 29,975.45 × 11,672.49
  4. Step 4: Simplify right side
    19,990.38x = 349,888,082.01
  5. Step 5: Solve for x
    x = 349,888,082.01/19,990.38
  6. Step 6: Final answer
    x = 17,502.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.