Home / 3,152.88-4,351.38-2,157.78

Finding the Fourth Proportional to 3,152.88, 4,351.38 and 2,157.78

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Solution

The fourth proportional to 3,152.88, 4,351.38 and 2,157.78 is: 2,978.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,152.88 : 4,351.38 = 2,157.78 : x
  2. Step 2: Convert to fraction form
    3,152.88/4,351.38 = 2,157.78/x
  3. Step 3: Cross multiply
    3,152.88x = 4,351.38 × 2,157.78
  4. Step 4: Simplify right side
    3,152.88x = 9,389,320.74
  5. Step 5: Solve for x
    x = 9,389,320.74/3,152.88
  6. Step 6: Final answer
    x = 2,978.01

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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.