Home / 3,948.15-5,431.68-3,838.80

Finding the Fourth Proportional to 3,948.15, 5,431.68 and 3,838.80

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Solution

The fourth proportional to 3,948.15, 5,431.68 and 3,838.80 is: 5,281.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,948.15 : 5,431.68 = 3,838.80 : x
  2. Step 2: Convert to fraction form
    3,948.15/5,431.68 = 3,838.80/x
  3. Step 3: Cross multiply
    3,948.15x = 5,431.68 × 3,838.80
  4. Step 4: Simplify right side
    3,948.15x = 20,851,133.18
  5. Step 5: Solve for x
    x = 20,851,133.18/3,948.15
  6. Step 6: Final answer
    x = 5,281.24

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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.