Home / 8,667.47-12,999.76-3,119.78

Finding the Fourth Proportional to 8,667.47, 12,999.76 and 3,119.78

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Solution

The fourth proportional to 8,667.47, 12,999.76 and 3,119.78 is: 4,679.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,667.47 : 12,999.76 = 3,119.78 : x
  2. Step 2: Convert to fraction form
    8,667.47/12,999.76 = 3,119.78/x
  3. Step 3: Cross multiply
    8,667.47x = 12,999.76 × 3,119.78
  4. Step 4: Simplify right side
    8,667.47x = 40,556,391.25
  5. Step 5: Solve for x
    x = 40,556,391.25/8,667.47
  6. Step 6: Final answer
    x = 4,679.15

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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.