Home / 6,480.30-9,720.45-2,781.90

Finding the Fourth Proportional to 6,480.30, 9,720.45 and 2,781.90

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Solution

The fourth proportional to 6,480.30, 9,720.45 and 2,781.90 is: 4,172.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,480.30 : 9,720.45 = 2,781.90 : x
  2. Step 2: Convert to fraction form
    6,480.30/9,720.45 = 2,781.90/x
  3. Step 3: Cross multiply
    6,480.30x = 9,720.45 × 2,781.90
  4. Step 4: Simplify right side
    6,480.30x = 27,041,319.86
  5. Step 5: Solve for x
    x = 27,041,319.86/6,480.30
  6. Step 6: Final answer
    x = 4,172.85

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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.