Home / 3,989.20-5,505.80-2,310.32

Finding the Fourth Proportional to 3,989.20, 5,505.80 and 2,310.32

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Solution

The fourth proportional to 3,989.20, 5,505.80 and 2,310.32 is: 3,188.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.20 : 5,505.80 = 2,310.32 : x
  2. Step 2: Convert to fraction form
    3,989.20/5,505.80 = 2,310.32/x
  3. Step 3: Cross multiply
    3,989.20x = 5,505.80 × 2,310.32
  4. Step 4: Simplify right side
    3,989.20x = 12,720,159.86
  5. Step 5: Solve for x
    x = 12,720,159.86/3,989.20
  6. Step 6: Final answer
    x = 3,188.65

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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.