Home / 3,139.16-4,329.90-1,959.80

Finding the Fourth Proportional to 3,139.16, 4,329.90 and 1,959.80

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Solution

The fourth proportional to 3,139.16, 4,329.90 and 1,959.80 is: 2,703.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.16 : 4,329.90 = 1,959.80 : x
  2. Step 2: Convert to fraction form
    3,139.16/4,329.90 = 1,959.80/x
  3. Step 3: Cross multiply
    3,139.16x = 4,329.90 × 1,959.80
  4. Step 4: Simplify right side
    3,139.16x = 8,485,738.02
  5. Step 5: Solve for x
    x = 8,485,738.02/3,139.16
  6. Step 6: Final answer
    x = 2,703.19

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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.