Home / 20,380.06-28,124.78-11,881.95

Finding the Fourth Proportional to 20,380.06, 28,124.78 and 11,881.95

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Solution

The fourth proportional to 20,380.06, 28,124.78 and 11,881.95 is: 16,397.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,380.06 : 28,124.78 = 11,881.95 : x
  2. Step 2: Convert to fraction form
    20,380.06/28,124.78 = 11,881.95/x
  3. Step 3: Cross multiply
    20,380.06x = 28,124.78 × 11,881.95
  4. Step 4: Simplify right side
    20,380.06x = 334,177,229.72
  5. Step 5: Solve for x
    x = 334,177,229.72/20,380.06
  6. Step 6: Final answer
    x = 16,397.26

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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.