Home / 27,817.97-38,388.79-15,881.07

Finding the Fourth Proportional to 27,817.97, 38,388.79 and 15,881.07

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Solution

The fourth proportional to 27,817.97, 38,388.79 and 15,881.07 is: 21,915.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,817.97 : 38,388.79 = 15,881.07 : x
  2. Step 2: Convert to fraction form
    27,817.97/38,388.79 = 15,881.07/x
  3. Step 3: Cross multiply
    27,817.97x = 38,388.79 × 15,881.07
  4. Step 4: Simplify right side
    27,817.97x = 609,654,981.80
  5. Step 5: Solve for x
    x = 609,654,981.80/27,817.97
  6. Step 6: Final answer
    x = 21,915.87

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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.