Home / 8,631.96-12,947.56-3,949.28

Finding the Fourth Proportional to 8,631.96, 12,947.56 and 3,949.28

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Solution

The fourth proportional to 8,631.96, 12,947.56 and 3,949.28 is: 5,923.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,631.96 : 12,947.56 = 3,949.28 : x
  2. Step 2: Convert to fraction form
    8,631.96/12,947.56 = 3,949.28/x
  3. Step 3: Cross multiply
    8,631.96x = 12,947.56 × 3,949.28
  4. Step 4: Simplify right side
    8,631.96x = 51,133,539.76
  5. Step 5: Solve for x
    x = 51,133,539.76/8,631.96
  6. Step 6: Final answer
    x = 5,923.75

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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.