Home / 3,929.12-5,422.65-2,251.06

Finding the Fourth Proportional to 3,929.12, 5,422.65 and 2,251.06

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Solution

The fourth proportional to 3,929.12, 5,422.65 and 2,251.06 is: 3,106.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.12 : 5,422.65 = 2,251.06 : x
  2. Step 2: Convert to fraction form
    3,929.12/5,422.65 = 2,251.06/x
  3. Step 3: Cross multiply
    3,929.12x = 5,422.65 × 2,251.06
  4. Step 4: Simplify right side
    3,929.12x = 12,206,688.51
  5. Step 5: Solve for x
    x = 12,206,688.51/3,929.12
  6. Step 6: Final answer
    x = 3,106.73

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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.