Home / 2,127.87-3,186.12-1,249.65

Finding the Fourth Proportional to 2,127.87, 3,186.12 and 1,249.65

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Solution

The fourth proportional to 2,127.87, 3,186.12 and 1,249.65 is: 1,871.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,127.87 : 3,186.12 = 1,249.65 : x
  2. Step 2: Convert to fraction form
    2,127.87/3,186.12 = 1,249.65/x
  3. Step 3: Cross multiply
    2,127.87x = 3,186.12 × 1,249.65
  4. Step 4: Simplify right side
    2,127.87x = 3,981,534.86
  5. Step 5: Solve for x
    x = 3,981,534.86/2,127.87
  6. Step 6: Final answer
    x = 1,871.14

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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.