Home / 2,172.86-3,256.70-1,249.06

Finding the Fourth Proportional to 2,172.86, 3,256.70 and 1,249.06

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Solution

The fourth proportional to 2,172.86, 3,256.70 and 1,249.06 is: 1,872.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.86 : 3,256.70 = 1,249.06 : x
  2. Step 2: Convert to fraction form
    2,172.86/3,256.70 = 1,249.06/x
  3. Step 3: Cross multiply
    2,172.86x = 3,256.70 × 1,249.06
  4. Step 4: Simplify right side
    2,172.86x = 4,067,813.70
  5. Step 5: Solve for x
    x = 4,067,813.70/2,172.86
  6. Step 6: Final answer
    x = 1,872.10

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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.