Home / 8,391.85-12,587.56-2,151.74

Finding the Fourth Proportional to 8,391.85, 12,587.56 and 2,151.74

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Solution

The fourth proportional to 8,391.85, 12,587.56 and 2,151.74 is: 3,227.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,391.85 : 12,587.56 = 2,151.74 : x
  2. Step 2: Convert to fraction form
    8,391.85/12,587.56 = 2,151.74/x
  3. Step 3: Cross multiply
    8,391.85x = 12,587.56 × 2,151.74
  4. Step 4: Simplify right side
    8,391.85x = 27,085,156.35
  5. Step 5: Solve for x
    x = 27,085,156.35/8,391.85
  6. Step 6: Final answer
    x = 3,227.55

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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.