Home / 8,780.60-13,170.90-5,310.56

Finding the Fourth Proportional to 8,780.60, 13,170.90 and 5,310.56

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Solution

The fourth proportional to 8,780.60, 13,170.90 and 5,310.56 is: 7,965.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,780.60 : 13,170.90 = 5,310.56 : x
  2. Step 2: Convert to fraction form
    8,780.60/13,170.90 = 5,310.56/x
  3. Step 3: Cross multiply
    8,780.60x = 13,170.90 × 5,310.56
  4. Step 4: Simplify right side
    8,780.60x = 69,944,907.55
  5. Step 5: Solve for x
    x = 69,944,907.55/8,780.60
  6. Step 6: Final answer
    x = 7,965.84

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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.