Home / 25,686.20-38,519.70-17,871.80

Finding the Fourth Proportional to 25,686.20, 38,519.70 and 17,871.80

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Solution

The fourth proportional to 25,686.20, 38,519.70 and 17,871.80 is: 26,801.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,686.20 : 38,519.70 = 17,871.80 : x
  2. Step 2: Convert to fraction form
    25,686.20/38,519.70 = 17,871.80/x
  3. Step 3: Cross multiply
    25,686.20x = 38,519.70 × 17,871.80
  4. Step 4: Simplify right side
    25,686.20x = 688,416,374.46
  5. Step 5: Solve for x
    x = 688,416,374.46/25,686.20
  6. Step 6: Final answer
    x = 26,801.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.