Home / 8,806.12-12,153.78-5,620.78

Finding the Fourth Proportional to 8,806.12, 12,153.78 and 5,620.78

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Solution

The fourth proportional to 8,806.12, 12,153.78 and 5,620.78 is: 7,757.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,806.12 : 12,153.78 = 5,620.78 : x
  2. Step 2: Convert to fraction form
    8,806.12/12,153.78 = 5,620.78/x
  3. Step 3: Cross multiply
    8,806.12x = 12,153.78 × 5,620.78
  4. Step 4: Simplify right side
    8,806.12x = 68,313,723.55
  5. Step 5: Solve for x
    x = 68,313,723.55/8,806.12
  6. Step 6: Final answer
    x = 7,757.53

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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.