Home / 25,687.20-38,521.20-17,872.80

Finding the Fourth Proportional to 25,687.20, 38,521.20 and 17,872.80

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Solution

The fourth proportional to 25,687.20, 38,521.20 and 17,872.80 is: 26,802.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,687.20 : 38,521.20 = 17,872.80 : x
  2. Step 2: Convert to fraction form
    25,687.20/38,521.20 = 17,872.80/x
  3. Step 3: Cross multiply
    25,687.20x = 38,521.20 × 17,872.80
  4. Step 4: Simplify right side
    25,687.20x = 688,481,703.36
  5. Step 5: Solve for x
    x = 688,481,703.36/25,687.20
  6. Step 6: Final answer
    x = 26,802.52

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1.5x scale

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.