Home / 20,712.90-28,584.52-11,760.11

Finding the Fourth Proportional to 20,712.90, 28,584.52 and 11,760.11

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Solution

The fourth proportional to 20,712.90, 28,584.52 and 11,760.11 is: 16,229.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.90 : 28,584.52 = 11,760.11 : x
  2. Step 2: Convert to fraction form
    20,712.90/28,584.52 = 11,760.11/x
  3. Step 3: Cross multiply
    20,712.90x = 28,584.52 × 11,760.11
  4. Step 4: Simplify right side
    20,712.90x = 336,156,927.17
  5. Step 5: Solve for x
    x = 336,156,927.17/20,712.90
  6. Step 6: Final answer
    x = 16,229.35

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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.