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Finding the Fourth Proportional to 6,480.20, 9,720.30 and 5,799.80

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Solution

The fourth proportional to 6,480.20, 9,720.30 and 5,799.80 is: 8,699.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,480.20 : 9,720.30 = 5,799.80 : x
  2. Step 2: Convert to fraction form
    6,480.20/9,720.30 = 5,799.80/x
  3. Step 3: Cross multiply
    6,480.20x = 9,720.30 × 5,799.80
  4. Step 4: Simplify right side
    6,480.20x = 56,375,795.94
  5. Step 5: Solve for x
    x = 56,375,795.94/6,480.20
  6. Step 6: Final answer
    x = 8,699.70

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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.