Home / 4,778.76-7,165.20-2,145.76

Finding the Fourth Proportional to 4,778.76, 7,165.20 and 2,145.76

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Solution

The fourth proportional to 4,778.76, 7,165.20 and 2,145.76 is: 3,217.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,778.76 : 7,165.20 = 2,145.76 : x
  2. Step 2: Convert to fraction form
    4,778.76/7,165.20 = 2,145.76/x
  3. Step 3: Cross multiply
    4,778.76x = 7,165.20 × 2,145.76
  4. Step 4: Simplify right side
    4,778.76x = 15,374,799.55
  5. Step 5: Solve for x
    x = 15,374,799.55/4,778.76
  6. Step 6: Final answer
    x = 3,217.32

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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.