Home / 8,125.23-12,189.67-2,578.76

Finding the Fourth Proportional to 8,125.23, 12,189.67 and 2,578.76

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Solution

The fourth proportional to 8,125.23, 12,189.67 and 2,578.76 is: 3,868.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,125.23 : 12,189.67 = 2,578.76 : x
  2. Step 2: Convert to fraction form
    8,125.23/12,189.67 = 2,578.76/x
  3. Step 3: Cross multiply
    8,125.23x = 12,189.67 × 2,578.76
  4. Step 4: Simplify right side
    8,125.23x = 31,434,221.40
  5. Step 5: Solve for x
    x = 31,434,221.40/8,125.23
  6. Step 6: Final answer
    x = 3,868.72

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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.