Home / 3,129.47-4,315.21-2,132.75

Finding the Fourth Proportional to 3,129.47, 4,315.21 and 2,132.75

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Solution

The fourth proportional to 3,129.47, 4,315.21 and 2,132.75 is: 2,940.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.47 : 4,315.21 = 2,132.75 : x
  2. Step 2: Convert to fraction form
    3,129.47/4,315.21 = 2,132.75/x
  3. Step 3: Cross multiply
    3,129.47x = 4,315.21 × 2,132.75
  4. Step 4: Simplify right side
    3,129.47x = 9,203,264.13
  5. Step 5: Solve for x
    x = 9,203,264.13/3,129.47
  6. Step 6: Final answer
    x = 2,940.84

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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.