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Finding the Fourth Proportional to 27,885.42, 38,481.87 and 15,310.14

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Solution

The fourth proportional to 27,885.42, 38,481.87 and 15,310.14 is: 21,127.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,885.42 : 38,481.87 = 15,310.14 : x
  2. Step 2: Convert to fraction form
    27,885.42/38,481.87 = 15,310.14/x
  3. Step 3: Cross multiply
    27,885.42x = 38,481.87 × 15,310.14
  4. Step 4: Simplify right side
    27,885.42x = 589,162,817.16
  5. Step 5: Solve for x
    x = 589,162,817.16/27,885.42
  6. Step 6: Final answer
    x = 21,127.99

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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.