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Finding the Fourth Proportional to 8,667.52, 12,999.84 and 3,119.76

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Solution

The fourth proportional to 8,667.52, 12,999.84 and 3,119.76 is: 4,679.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,667.52 : 12,999.84 = 3,119.76 : x
  2. Step 2: Convert to fraction form
    8,667.52/12,999.84 = 3,119.76/x
  3. Step 3: Cross multiply
    8,667.52x = 12,999.84 × 3,119.76
  4. Step 4: Simplify right side
    8,667.52x = 40,556,380.84
  5. Step 5: Solve for x
    x = 40,556,380.84/8,667.52
  6. Step 6: Final answer
    x = 4,679.12

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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.