Home / 3,120.74-4,308.18-1,942.20

Finding the Fourth Proportional to 3,120.74, 4,308.18 and 1,942.20

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Solution

The fourth proportional to 3,120.74, 4,308.18 and 1,942.20 is: 2,681.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.74 : 4,308.18 = 1,942.20 : x
  2. Step 2: Convert to fraction form
    3,120.74/4,308.18 = 1,942.20/x
  3. Step 3: Cross multiply
    3,120.74x = 4,308.18 × 1,942.20
  4. Step 4: Simplify right side
    3,120.74x = 8,367,347.20
  5. Step 5: Solve for x
    x = 8,367,347.20/3,120.74
  6. Step 6: Final answer
    x = 2,681.21

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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.