Home / 5,167.65-7,131.38-2,809.78

Finding the Fourth Proportional to 5,167.65, 7,131.38 and 2,809.78

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Solution

The fourth proportional to 5,167.65, 7,131.38 and 2,809.78 is: 3,877.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,167.65 : 7,131.38 = 2,809.78 : x
  2. Step 2: Convert to fraction form
    5,167.65/7,131.38 = 2,809.78/x
  3. Step 3: Cross multiply
    5,167.65x = 7,131.38 × 2,809.78
  4. Step 4: Simplify right side
    5,167.65x = 20,037,608.90
  5. Step 5: Solve for x
    x = 20,037,608.90/5,167.65
  6. Step 6: Final answer
    x = 3,877.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.