Home / 2,121.68-3,178.92-1,026.56

Finding the Fourth Proportional to 2,121.68, 3,178.92 and 1,026.56

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Solution

The fourth proportional to 2,121.68, 3,178.92 and 1,026.56 is: 1,538.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.68 : 3,178.92 = 1,026.56 : x
  2. Step 2: Convert to fraction form
    2,121.68/3,178.92 = 1,026.56/x
  3. Step 3: Cross multiply
    2,121.68x = 3,178.92 × 1,026.56
  4. Step 4: Simplify right side
    2,121.68x = 3,263,352.12
  5. Step 5: Solve for x
    x = 3,263,352.12/2,121.68
  6. Step 6: Final answer
    x = 1,538.10

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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.