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Finding the Fourth Proportional to 8,385.88, 12,578.09 and 2,839.11

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Solution

The fourth proportional to 8,385.88, 12,578.09 and 2,839.11 is: 4,258.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,385.88 : 12,578.09 = 2,839.11 : x
  2. Step 2: Convert to fraction form
    8,385.88/12,578.09 = 2,839.11/x
  3. Step 3: Cross multiply
    8,385.88x = 12,578.09 × 2,839.11
  4. Step 4: Simplify right side
    8,385.88x = 35,710,581.10
  5. Step 5: Solve for x
    x = 35,710,581.10/8,385.88
  6. Step 6: Final answer
    x = 4,258.42

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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.