Home / 20,511.66-28,301.12-11,559.17

Finding the Fourth Proportional to 20,511.66, 28,301.12 and 11,559.17

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Solution

The fourth proportional to 20,511.66, 28,301.12 and 11,559.17 is: 15,948.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.66 : 28,301.12 = 11,559.17 : x
  2. Step 2: Convert to fraction form
    20,511.66/28,301.12 = 11,559.17/x
  3. Step 3: Cross multiply
    20,511.66x = 28,301.12 × 11,559.17
  4. Step 4: Simplify right side
    20,511.66x = 327,137,257.97
  5. Step 5: Solve for x
    x = 327,137,257.97/20,511.66
  6. Step 6: Final answer
    x = 15,948.84

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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.