Home / 3,711.29-5,122.06-2,139.40

Finding the Fourth Proportional to 3,711.29, 5,122.06 and 2,139.40

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Solution

The fourth proportional to 3,711.29, 5,122.06 and 2,139.40 is: 2,952.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,711.29 : 5,122.06 = 2,139.40 : x
  2. Step 2: Convert to fraction form
    3,711.29/5,122.06 = 2,139.40/x
  3. Step 3: Cross multiply
    3,711.29x = 5,122.06 × 2,139.40
  4. Step 4: Simplify right side
    3,711.29x = 10,958,117.01
  5. Step 5: Solve for x
    x = 10,958,117.01/3,711.29
  6. Step 6: Final answer
    x = 2,952.64

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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.