Home / 20,724.90-31,100.97-11,371.47

Finding the Fourth Proportional to 20,724.90, 31,100.97 and 11,371.47

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Solution

The fourth proportional to 20,724.90, 31,100.97 and 11,371.47 is: 17,064.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,724.90 : 31,100.97 = 11,371.47 : x
  2. Step 2: Convert to fraction form
    20,724.90/31,100.97 = 11,371.47/x
  3. Step 3: Cross multiply
    20,724.90x = 31,100.97 × 11,371.47
  4. Step 4: Simplify right side
    20,724.90x = 353,663,747.33
  5. Step 5: Solve for x
    x = 353,663,747.33/20,724.90
  6. Step 6: Final answer
    x = 17,064.68

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1.5x scale

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.