Home / 3,187.12-4,401.90-2,123.13

Finding the Fourth Proportional to 3,187.12, 4,401.90 and 2,123.13

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Solution

The fourth proportional to 3,187.12, 4,401.90 and 2,123.13 is: 2,932.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.12 : 4,401.90 = 2,123.13 : x
  2. Step 2: Convert to fraction form
    3,187.12/4,401.90 = 2,123.13/x
  3. Step 3: Cross multiply
    3,187.12x = 4,401.90 × 2,123.13
  4. Step 4: Simplify right side
    3,187.12x = 9,345,805.95
  5. Step 5: Solve for x
    x = 9,345,805.95/3,187.12
  6. Step 6: Final answer
    x = 2,932.37

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Half scale
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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.