Home / 20,939-28,895.82-11,508.17

Finding the Fourth Proportional to 20,939, 28,895.82 and 11,508.17

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Solution

The fourth proportional to 20,939, 28,895.82 and 11,508.17 is: 15,881.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939 : 28,895.82 = 11,508.17 : x
  2. Step 2: Convert to fraction form
    20,939/28,895.82 = 11,508.17/x
  3. Step 3: Cross multiply
    20,939x = 28,895.82 × 11,508.17
  4. Step 4: Simplify right side
    20,939x = 332,538,008.85
  5. Step 5: Solve for x
    x = 332,538,008.85/20,939
  6. Step 6: Final answer
    x = 15,881.27

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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.