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Finding the Fourth Proportional to 20,148.95, 27,799.18 and 12,080.95

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Solution

The fourth proportional to 20,148.95, 27,799.18 and 12,080.95 is: 16,667.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,148.95 : 27,799.18 = 12,080.95 : x
  2. Step 2: Convert to fraction form
    20,148.95/27,799.18 = 12,080.95/x
  3. Step 3: Cross multiply
    20,148.95x = 27,799.18 × 12,080.95
  4. Step 4: Simplify right side
    20,148.95x = 335,840,503.62
  5. Step 5: Solve for x
    x = 335,840,503.62/20,148.95
  6. Step 6: Final answer
    x = 16,667.89

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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.