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Finding the Fourth Proportional to 6,489.84, 8,958.96 and 4,251.84

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Solution

The fourth proportional to 6,489.84, 8,958.96 and 4,251.84 is: 5,869.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,489.84 : 8,958.96 = 4,251.84 : x
  2. Step 2: Convert to fraction form
    6,489.84/8,958.96 = 4,251.84/x
  3. Step 3: Cross multiply
    6,489.84x = 8,958.96 × 4,251.84
  4. Step 4: Simplify right side
    6,489.84x = 38,092,064.49
  5. Step 5: Solve for x
    x = 38,092,064.49/6,489.84
  6. Step 6: Final answer
    x = 5,869.49

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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.