Home / 2,625.87-3,938.80-2,161.79

Finding the Fourth Proportional to 2,625.87, 3,938.80 and 2,161.79

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Solution

The fourth proportional to 2,625.87, 3,938.80 and 2,161.79 is: 3,242.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,625.87 : 3,938.80 = 2,161.79 : x
  2. Step 2: Convert to fraction form
    2,625.87/3,938.80 = 2,161.79/x
  3. Step 3: Cross multiply
    2,625.87x = 3,938.80 × 2,161.79
  4. Step 4: Simplify right side
    2,625.87x = 8,514,854.01
  5. Step 5: Solve for x
    x = 8,514,854.01/2,625.87
  6. Step 6: Final answer
    x = 3,242.68

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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.