Home / 15,521.25-21,441.11-13,842.12

Finding the Fourth Proportional to 15,521.25, 21,441.11 and 13,842.12

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Solution

The fourth proportional to 15,521.25, 21,441.11 and 13,842.12 is: 19,121.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,521.25 : 21,441.11 = 13,842.12 : x
  2. Step 2: Convert to fraction form
    15,521.25/21,441.11 = 13,842.12/x
  3. Step 3: Cross multiply
    15,521.25x = 21,441.11 × 13,842.12
  4. Step 4: Simplify right side
    15,521.25x = 296,790,348.34
  5. Step 5: Solve for x
    x = 296,790,348.34/15,521.25
  6. Step 6: Final answer
    x = 19,121.55

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Half scale
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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.