Home / 3,929.74-5,422.36-2,228.16

Finding the Fourth Proportional to 3,929.74, 5,422.36 and 2,228.16

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Solution

The fourth proportional to 3,929.74, 5,422.36 and 2,228.16 is: 3,074.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.74 : 5,422.36 = 2,228.16 : x
  2. Step 2: Convert to fraction form
    3,929.74/5,422.36 = 2,228.16/x
  3. Step 3: Cross multiply
    3,929.74x = 5,422.36 × 2,228.16
  4. Step 4: Simplify right side
    3,929.74x = 12,081,885.66
  5. Step 5: Solve for x
    x = 12,081,885.66/3,929.74
  6. Step 6: Final answer
    x = 3,074.47

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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.