Home / 8,318.97-12,480.89-3,125.25

Finding the Fourth Proportional to 8,318.97, 12,480.89 and 3,125.25

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Solution

The fourth proportional to 8,318.97, 12,480.89 and 3,125.25 is: 4,688.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,318.97 : 12,480.89 = 3,125.25 : x
  2. Step 2: Convert to fraction form
    8,318.97/12,480.89 = 3,125.25/x
  3. Step 3: Cross multiply
    8,318.97x = 12,480.89 × 3,125.25
  4. Step 4: Simplify right side
    8,318.97x = 39,005,885.85
  5. Step 5: Solve for x
    x = 39,005,885.85/8,318.97
  6. Step 6: Final answer
    x = 4,688.79

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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.