Home / 8,147.28-12,221.15-2,881.55

Finding the Fourth Proportional to 8,147.28, 12,221.15 and 2,881.55

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Solution

The fourth proportional to 8,147.28, 12,221.15 and 2,881.55 is: 4,322.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,147.28 : 12,221.15 = 2,881.55 : x
  2. Step 2: Convert to fraction form
    8,147.28/12,221.15 = 2,881.55/x
  3. Step 3: Cross multiply
    8,147.28x = 12,221.15 × 2,881.55
  4. Step 4: Simplify right side
    8,147.28x = 35,215,875.03
  5. Step 5: Solve for x
    x = 35,215,875.03/8,147.28
  6. Step 6: Final answer
    x = 4,322.41

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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.