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Finding the Fourth Proportional to 20,127.70, 30,191.55 and 14,619.70

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Solution

The fourth proportional to 20,127.70, 30,191.55 and 14,619.70 is: 21,929.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,127.70 : 30,191.55 = 14,619.70 : x
  2. Step 2: Convert to fraction form
    20,127.70/30,191.55 = 14,619.70/x
  3. Step 3: Cross multiply
    20,127.70x = 30,191.55 × 14,619.70
  4. Step 4: Simplify right side
    20,127.70x = 441,391,403.54
  5. Step 5: Solve for x
    x = 441,391,403.54/20,127.70
  6. Step 6: Final answer
    x = 21,929.55

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Similar ratio
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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.