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Finding the Fourth Proportional to 8,679.84, 13,020.48 and 2,836.32

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Solution

The fourth proportional to 8,679.84, 13,020.48 and 2,836.32 is: 4,254.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.84 : 13,020.48 = 2,836.32 : x
  2. Step 2: Convert to fraction form
    8,679.84/13,020.48 = 2,836.32/x
  3. Step 3: Cross multiply
    8,679.84x = 13,020.48 × 2,836.32
  4. Step 4: Simplify right side
    8,679.84x = 36,930,247.83
  5. Step 5: Solve for x
    x = 36,930,247.83/8,679.84
  6. Step 6: Final answer
    x = 4,254.72

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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.