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Finding the Fourth Proportional to 27,691.65, 38,213.99 and 15,754.73

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Solution

The fourth proportional to 27,691.65, 38,213.99 and 15,754.73 is: 21,741.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,691.65 : 38,213.99 = 15,754.73 : x
  2. Step 2: Convert to fraction form
    27,691.65/38,213.99 = 15,754.73/x
  3. Step 3: Cross multiply
    27,691.65x = 38,213.99 × 15,754.73
  4. Step 4: Simplify right side
    27,691.65x = 602,051,131.13
  5. Step 5: Solve for x
    x = 602,051,131.13/27,691.65
  6. Step 6: Final answer
    x = 21,741.25

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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.