Home / 2,691.38-3,711.27-2,130.94

Finding the Fourth Proportional to 2,691.38, 3,711.27 and 2,130.94

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Solution

The fourth proportional to 2,691.38, 3,711.27 and 2,130.94 is: 2,938.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,691.38 : 3,711.27 = 2,130.94 : x
  2. Step 2: Convert to fraction form
    2,691.38/3,711.27 = 2,130.94/x
  3. Step 3: Cross multiply
    2,691.38x = 3,711.27 × 2,130.94
  4. Step 4: Simplify right side
    2,691.38x = 7,908,493.69
  5. Step 5: Solve for x
    x = 7,908,493.69/2,691.38
  6. Step 6: Final answer
    x = 2,938.45

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.