Home / 5,479.60-7,560.12-3,121.60

Finding the Fourth Proportional to 5,479.60, 7,560.12 and 3,121.60

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Solution

The fourth proportional to 5,479.60, 7,560.12 and 3,121.60 is: 4,306.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,479.60 : 7,560.12 = 3,121.60 : x
  2. Step 2: Convert to fraction form
    5,479.60/7,560.12 = 3,121.60/x
  3. Step 3: Cross multiply
    5,479.60x = 7,560.12 × 3,121.60
  4. Step 4: Simplify right side
    5,479.60x = 23,599,670.59
  5. Step 5: Solve for x
    x = 23,599,670.59/5,479.60
  6. Step 6: Final answer
    x = 4,306.82

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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.