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Finding the Fourth Proportional to 20,378.82, 30,543.72 and 17,696.82

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Solution

The fourth proportional to 20,378.82, 30,543.72 and 17,696.82 is: 26,523.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,378.82 : 30,543.72 = 17,696.82 : x
  2. Step 2: Convert to fraction form
    20,378.82/30,543.72 = 17,696.82/x
  3. Step 3: Cross multiply
    20,378.82x = 30,543.72 × 17,696.82
  4. Step 4: Simplify right side
    20,378.82x = 540,526,714.97
  5. Step 5: Solve for x
    x = 540,526,714.97/20,378.82
  6. Step 6: Final answer
    x = 26,523.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.