Home / 8,540.35-12,792.58-5,418.75

Finding the Fourth Proportional to 8,540.35, 12,792.58 and 5,418.75

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Solution

The fourth proportional to 8,540.35, 12,792.58 and 5,418.75 is: 8,116.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,540.35 : 12,792.58 = 5,418.75 : x
  2. Step 2: Convert to fraction form
    8,540.35/12,792.58 = 5,418.75/x
  3. Step 3: Cross multiply
    8,540.35x = 12,792.58 × 5,418.75
  4. Step 4: Simplify right side
    8,540.35x = 69,319,785.82
  5. Step 5: Solve for x
    x = 69,319,785.82/8,540.35
  6. Step 6: Final answer
    x = 8,116.74

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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.