Home / 5,121.60-7,682.40-4,659.90

Finding the Fourth Proportional to 5,121.60, 7,682.40 and 4,659.90

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Solution

The fourth proportional to 5,121.60, 7,682.40 and 4,659.90 is: 6,989.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.60 : 7,682.40 = 4,659.90 : x
  2. Step 2: Convert to fraction form
    5,121.60/7,682.40 = 4,659.90/x
  3. Step 3: Cross multiply
    5,121.60x = 7,682.40 × 4,659.90
  4. Step 4: Simplify right side
    5,121.60x = 35,799,215.76
  5. Step 5: Solve for x
    x = 35,799,215.76/5,121.60
  6. Step 6: Final answer
    x = 6,989.85

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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.