Home / 8,631.46-12,945.48-2,389.78

Finding the Fourth Proportional to 8,631.46, 12,945.48 and 2,389.78

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Solution

The fourth proportional to 8,631.46, 12,945.48 and 2,389.78 is: 3,584.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,631.46 : 12,945.48 = 2,389.78 : x
  2. Step 2: Convert to fraction form
    8,631.46/12,945.48 = 2,389.78/x
  3. Step 3: Cross multiply
    8,631.46x = 12,945.48 × 2,389.78
  4. Step 4: Simplify right side
    8,631.46x = 30,936,849.19
  5. Step 5: Solve for x
    x = 30,936,849.19/8,631.46
  6. Step 6: Final answer
    x = 3,584.20

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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.