Home / 25,871.10-35,685.27-21,147.90

Finding the Fourth Proportional to 25,871.10, 35,685.27 and 21,147.90

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Solution

The fourth proportional to 25,871.10, 35,685.27 and 21,147.90 is: 29,170.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,871.10 : 35,685.27 = 21,147.90 : x
  2. Step 2: Convert to fraction form
    25,871.10/35,685.27 = 21,147.90/x
  3. Step 3: Cross multiply
    25,871.10x = 35,685.27 × 21,147.90
  4. Step 4: Simplify right side
    25,871.10x = 754,668,521.43
  5. Step 5: Solve for x
    x = 754,668,521.43/25,871.10
  6. Step 6: Final answer
    x = 29,170.33

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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.