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Finding the Fourth Proportional to 20,703.68, 30,997.20 and 18,604.16

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Solution

The fourth proportional to 20,703.68, 30,997.20 and 18,604.16 is: 27,853.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,703.68 : 30,997.20 = 18,604.16 : x
  2. Step 2: Convert to fraction form
    20,703.68/30,997.20 = 18,604.16/x
  3. Step 3: Cross multiply
    20,703.68x = 30,997.20 × 18,604.16
  4. Step 4: Simplify right side
    20,703.68x = 576,676,868.35
  5. Step 5: Solve for x
    x = 576,676,868.35/20,703.68
  6. Step 6: Final answer
    x = 27,853.83

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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.