Home / 8,631.83-12,947.75-2,788.90

Finding the Fourth Proportional to 8,631.83, 12,947.75 and 2,788.90

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Solution

The fourth proportional to 8,631.83, 12,947.75 and 2,788.90 is: 4,183.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,631.83 : 12,947.75 = 2,788.90 : x
  2. Step 2: Convert to fraction form
    8,631.83/12,947.75 = 2,788.90/x
  3. Step 3: Cross multiply
    8,631.83x = 12,947.75 × 2,788.90
  4. Step 4: Simplify right side
    8,631.83x = 36,109,944.12
  5. Step 5: Solve for x
    x = 36,109,944.12/8,631.83
  6. Step 6: Final answer
    x = 4,183.35

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Similar ratio
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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.