Home / 8,648.91-12,971.88-2,805.57

Finding the Fourth Proportional to 8,648.91, 12,971.88 and 2,805.57

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Solution

The fourth proportional to 8,648.91, 12,971.88 and 2,805.57 is: 4,207.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,648.91 : 12,971.88 = 2,805.57 : x
  2. Step 2: Convert to fraction form
    8,648.91/12,971.88 = 2,805.57/x
  3. Step 3: Cross multiply
    8,648.91x = 12,971.88 × 2,805.57
  4. Step 4: Simplify right side
    8,648.91x = 36,393,517.37
  5. Step 5: Solve for x
    x = 36,393,517.37/8,648.91
  6. Step 6: Final answer
    x = 4,207.87

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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.