Home / 2,121.87-3,182.78-1,154.13

Finding the Fourth Proportional to 2,121.87, 3,182.78 and 1,154.13

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Solution

The fourth proportional to 2,121.87, 3,182.78 and 1,154.13 is: 1,731.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.87 : 3,182.78 = 1,154.13 : x
  2. Step 2: Convert to fraction form
    2,121.87/3,182.78 = 1,154.13/x
  3. Step 3: Cross multiply
    2,121.87x = 3,182.78 × 1,154.13
  4. Step 4: Simplify right side
    2,121.87x = 3,673,332.83
  5. Step 5: Solve for x
    x = 3,673,332.83/2,121.87
  6. Step 6: Final answer
    x = 1,731.17

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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.