Home / 2,139.17-3,207.54-1,274.09

Finding the Fourth Proportional to 2,139.17, 3,207.54 and 1,274.09

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Solution

The fourth proportional to 2,139.17, 3,207.54 and 1,274.09 is: 1,910.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.17 : 3,207.54 = 1,274.09 : x
  2. Step 2: Convert to fraction form
    2,139.17/3,207.54 = 1,274.09/x
  3. Step 3: Cross multiply
    2,139.17x = 3,207.54 × 1,274.09
  4. Step 4: Simplify right side
    2,139.17x = 4,086,694.64
  5. Step 5: Solve for x
    x = 4,086,694.64/2,139.17
  6. Step 6: Final answer
    x = 1,910.41

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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.