Home / 3,142.20-4,339.80-2,726.40

Finding the Fourth Proportional to 3,142.20, 4,339.80 and 2,726.40

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Solution

The fourth proportional to 3,142.20, 4,339.80 and 2,726.40 is: 3,765.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,142.20 : 4,339.80 = 2,726.40 : x
  2. Step 2: Convert to fraction form
    3,142.20/4,339.80 = 2,726.40/x
  3. Step 3: Cross multiply
    3,142.20x = 4,339.80 × 2,726.40
  4. Step 4: Simplify right side
    3,142.20x = 11,832,030.72
  5. Step 5: Solve for x
    x = 11,832,030.72/3,142.20
  6. Step 6: Final answer
    x = 3,765.52

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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.