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Finding the Fourth Proportional to 6,396.80, 8,829.45 and 4,158.90

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Solution

The fourth proportional to 6,396.80, 8,829.45 and 4,158.90 is: 5,740.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,396.80 : 8,829.45 = 4,158.90 : x
  2. Step 2: Convert to fraction form
    6,396.80/8,829.45 = 4,158.90/x
  3. Step 3: Cross multiply
    6,396.80x = 8,829.45 × 4,158.90
  4. Step 4: Simplify right side
    6,396.80x = 36,720,799.61
  5. Step 5: Solve for x
    x = 36,720,799.61/6,396.80
  6. Step 6: Final answer
    x = 5,740.50

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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.