Home / 3,948.20-5,434.26-3,721.40

Finding the Fourth Proportional to 3,948.20, 5,434.26 and 3,721.40

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Solution

The fourth proportional to 3,948.20, 5,434.26 and 3,721.40 is: 5,122.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,948.20 : 5,434.26 = 3,721.40 : x
  2. Step 2: Convert to fraction form
    3,948.20/5,434.26 = 3,721.40/x
  3. Step 3: Cross multiply
    3,948.20x = 5,434.26 × 3,721.40
  4. Step 4: Simplify right side
    3,948.20x = 20,223,055.16
  5. Step 5: Solve for x
    x = 20,223,055.16/3,948.20
  6. Step 6: Final answer
    x = 5,122.09

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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.