Home / 4,122.87-5,685.20-2,630.85

Finding the Fourth Proportional to 4,122.87, 5,685.20 and 2,630.85

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Solution

The fourth proportional to 4,122.87, 5,685.20 and 2,630.85 is: 3,627.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,122.87 : 5,685.20 = 2,630.85 : x
  2. Step 2: Convert to fraction form
    4,122.87/5,685.20 = 2,630.85/x
  3. Step 3: Cross multiply
    4,122.87x = 5,685.20 × 2,630.85
  4. Step 4: Simplify right side
    4,122.87x = 14,956,905.13
  5. Step 5: Solve for x
    x = 14,956,905.13/4,122.87
  6. Step 6: Final answer
    x = 3,627.79

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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.