Home / 8,631.63-12,949.34-2,788.11

Finding the Fourth Proportional to 8,631.63, 12,949.34 and 2,788.11

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Solution

The fourth proportional to 8,631.63, 12,949.34 and 2,788.11 is: 4,182.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,631.63 : 12,949.34 = 2,788.11 : x
  2. Step 2: Convert to fraction form
    8,631.63/12,949.34 = 2,788.11/x
  3. Step 3: Cross multiply
    8,631.63x = 12,949.34 × 2,788.11
  4. Step 4: Simplify right side
    8,631.63x = 36,104,170.41
  5. Step 5: Solve for x
    x = 36,104,170.41/8,631.63
  6. Step 6: Final answer
    x = 4,182.78

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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.