Home / 3,752.06-5,178.25-2,158.78

Finding the Fourth Proportional to 3,752.06, 5,178.25 and 2,158.78

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Solution

The fourth proportional to 3,752.06, 5,178.25 and 2,158.78 is: 2,979.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,752.06 : 5,178.25 = 2,158.78 : x
  2. Step 2: Convert to fraction form
    3,752.06/5,178.25 = 2,158.78/x
  3. Step 3: Cross multiply
    3,752.06x = 5,178.25 × 2,158.78
  4. Step 4: Simplify right side
    3,752.06x = 11,178,684.19
  5. Step 5: Solve for x
    x = 11,178,684.19/3,752.06
  6. Step 6: Final answer
    x = 2,979.35

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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.