Home / 20,712.91-28,584.56-11,760.18

Finding the Fourth Proportional to 20,712.91, 28,584.56 and 11,760.18

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Solution

The fourth proportional to 20,712.91, 28,584.56 and 11,760.18 is: 16,229.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.91 : 28,584.56 = 11,760.18 : x
  2. Step 2: Convert to fraction form
    20,712.91/28,584.56 = 11,760.18/x
  3. Step 3: Cross multiply
    20,712.91x = 28,584.56 × 11,760.18
  4. Step 4: Simplify right side
    20,712.91x = 336,159,427.90
  5. Step 5: Solve for x
    x = 336,159,427.90/20,712.91
  6. Step 6: Final answer
    x = 16,229.47

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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.