Home / 3,180.10-4,387.74-1,921.90

Finding the Fourth Proportional to 3,180.10, 4,387.74 and 1,921.90

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Solution

The fourth proportional to 3,180.10, 4,387.74 and 1,921.90 is: 2,651.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,180.10 : 4,387.74 = 1,921.90 : x
  2. Step 2: Convert to fraction form
    3,180.10/4,387.74 = 1,921.90/x
  3. Step 3: Cross multiply
    3,180.10x = 4,387.74 × 1,921.90
  4. Step 4: Simplify right side
    3,180.10x = 8,432,797.51
  5. Step 5: Solve for x
    x = 8,432,797.51/3,180.10
  6. Step 6: Final answer
    x = 2,651.74

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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.