Home / 21,781.38-30,053.66-12,825.61

Finding the Fourth Proportional to 21,781.38, 30,053.66 and 12,825.61

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Solution

The fourth proportional to 21,781.38, 30,053.66 and 12,825.61 is: 17,696.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,781.38 : 30,053.66 = 12,825.61 : x
  2. Step 2: Convert to fraction form
    21,781.38/30,053.66 = 12,825.61/x
  3. Step 3: Cross multiply
    21,781.38x = 30,053.66 × 12,825.61
  4. Step 4: Simplify right side
    21,781.38x = 385,456,522.23
  5. Step 5: Solve for x
    x = 385,456,522.23/21,781.38
  6. Step 6: Final answer
    x = 17,696.61

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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.