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Finding the Fourth Proportional to 8,679.88, 13,021.96 and 2,439.88

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Solution

The fourth proportional to 8,679.88, 13,021.96 and 2,439.88 is: 3,660.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.88 : 13,021.96 = 2,439.88 : x
  2. Step 2: Convert to fraction form
    8,679.88/13,021.96 = 2,439.88/x
  3. Step 3: Cross multiply
    8,679.88x = 13,021.96 × 2,439.88
  4. Step 4: Simplify right side
    8,679.88x = 31,772,019.76
  5. Step 5: Solve for x
    x = 31,772,019.76/8,679.88
  6. Step 6: Final answer
    x = 3,660.42

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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.