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Finding the Fourth Proportional to 20,392.70, 30,589.05 and 6,543.10

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Solution

The fourth proportional to 20,392.70, 30,589.05 and 6,543.10 is: 9,814.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,392.70 : 30,589.05 = 6,543.10 : x
  2. Step 2: Convert to fraction form
    20,392.70/30,589.05 = 6,543.10/x
  3. Step 3: Cross multiply
    20,392.70x = 30,589.05 × 6,543.10
  4. Step 4: Simplify right side
    20,392.70x = 200,147,213.06
  5. Step 5: Solve for x
    x = 200,147,213.06/20,392.70
  6. Step 6: Final answer
    x = 9,814.65

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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.