Home / 3,929.06-5,422.07-2,136.53

Finding the Fourth Proportional to 3,929.06, 5,422.07 and 2,136.53

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Solution

The fourth proportional to 3,929.06, 5,422.07 and 2,136.53 is: 2,948.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.06 : 5,422.07 = 2,136.53 : x
  2. Step 2: Convert to fraction form
    3,929.06/5,422.07 = 2,136.53/x
  3. Step 3: Cross multiply
    3,929.06x = 5,422.07 × 2,136.53
  4. Step 4: Simplify right side
    3,929.06x = 11,584,434.11
  5. Step 5: Solve for x
    x = 11,584,434.11/3,929.06
  6. Step 6: Final answer
    x = 2,948.40

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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.