Home / 8,171.20-12,264.48-4,278.40

Finding the Fourth Proportional to 8,171.20, 12,264.48 and 4,278.40

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Solution

The fourth proportional to 8,171.20, 12,264.48 and 4,278.40 is: 6,421.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,171.20 : 12,264.48 = 4,278.40 : x
  2. Step 2: Convert to fraction form
    8,171.20/12,264.48 = 4,278.40/x
  3. Step 3: Cross multiply
    8,171.20x = 12,264.48 × 4,278.40
  4. Step 4: Simplify right side
    8,171.20x = 52,472,351.23
  5. Step 5: Solve for x
    x = 52,472,351.23/8,171.20
  6. Step 6: Final answer
    x = 6,421.62

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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.