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Finding the Fourth Proportional to 27,891, 38,489.86 and 15,316.02

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Solution

The fourth proportional to 27,891, 38,489.86 and 15,316.02 is: 21,136.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,891 : 38,489.86 = 15,316.02 : x
  2. Step 2: Convert to fraction form
    27,891/38,489.86 = 15,316.02/x
  3. Step 3: Cross multiply
    27,891x = 38,489.86 × 15,316.02
  4. Step 4: Simplify right side
    27,891x = 589,511,465.56
  5. Step 5: Solve for x
    x = 589,511,465.56/27,891
  6. Step 6: Final answer
    x = 21,136.26

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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.