Home / 3,117.80-4,684.80-2,761.40

Finding the Fourth Proportional to 3,117.80, 4,684.80 and 2,761.40

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Solution

The fourth proportional to 3,117.80, 4,684.80 and 2,761.40 is: 4,149.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,117.80 : 4,684.80 = 2,761.40 : x
  2. Step 2: Convert to fraction form
    3,117.80/4,684.80 = 2,761.40/x
  3. Step 3: Cross multiply
    3,117.80x = 4,684.80 × 2,761.40
  4. Step 4: Simplify right side
    3,117.80x = 12,936,606.72
  5. Step 5: Solve for x
    x = 12,936,606.72/3,117.80
  6. Step 6: Final answer
    x = 4,149.27

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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.