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Finding the Fourth Proportional to 8,679.84, 13,019.70 and 2,836.86

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Solution

The fourth proportional to 8,679.84, 13,019.70 and 2,836.86 is: 4,255.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.84 : 13,019.70 = 2,836.86 : x
  2. Step 2: Convert to fraction form
    8,679.84/13,019.70 = 2,836.86/x
  3. Step 3: Cross multiply
    8,679.84x = 13,019.70 × 2,836.86
  4. Step 4: Simplify right side
    8,679.84x = 36,935,066.14
  5. Step 5: Solve for x
    x = 36,935,066.14/8,679.84
  6. Step 6: Final answer
    x = 4,255.27

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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.