Home / 3,959.40-5,933.70-2,639.40

Finding the Fourth Proportional to 3,959.40, 5,933.70 and 2,639.40

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Solution

The fourth proportional to 3,959.40, 5,933.70 and 2,639.40 is: 3,955.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,959.40 : 5,933.70 = 2,639.40 : x
  2. Step 2: Convert to fraction form
    3,959.40/5,933.70 = 2,639.40/x
  3. Step 3: Cross multiply
    3,959.40x = 5,933.70 × 2,639.40
  4. Step 4: Simplify right side
    3,959.40x = 15,661,407.78
  5. Step 5: Solve for x
    x = 15,661,407.78/3,959.40
  6. Step 6: Final answer
    x = 3,955.50

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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.