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Finding the Fourth Proportional to 20,503.38, 30,759.87 and 8,810.10

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Solution

The fourth proportional to 20,503.38, 30,759.87 and 8,810.10 is: 13,217.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,503.38 : 30,759.87 = 8,810.10 : x
  2. Step 2: Convert to fraction form
    20,503.38/30,759.87 = 8,810.10/x
  3. Step 3: Cross multiply
    20,503.38x = 30,759.87 × 8,810.10
  4. Step 4: Simplify right side
    20,503.38x = 270,997,530.69
  5. Step 5: Solve for x
    x = 270,997,530.69/20,503.38
  6. Step 6: Final answer
    x = 13,217.21

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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.