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Finding the Fourth Proportional to 8,757.80, 13,140.30 and 3,213.80

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Solution

The fourth proportional to 8,757.80, 13,140.30 and 3,213.80 is: 4,822.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,757.80 : 13,140.30 = 3,213.80 : x
  2. Step 2: Convert to fraction form
    8,757.80/13,140.30 = 3,213.80/x
  3. Step 3: Cross multiply
    8,757.80x = 13,140.30 × 3,213.80
  4. Step 4: Simplify right side
    8,757.80x = 42,230,296.14
  5. Step 5: Solve for x
    x = 42,230,296.14/8,757.80
  6. Step 6: Final answer
    x = 4,822.02

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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.