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Finding the Fourth Proportional to 15,286.76, 21,094.50 and 8,481

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Solution

The fourth proportional to 15,286.76, 21,094.50 and 8,481 is: 11,703.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,286.76 : 21,094.50 = 8,481 : x
  2. Step 2: Convert to fraction form
    15,286.76/21,094.50 = 8,481/x
  3. Step 3: Cross multiply
    15,286.76x = 21,094.50 × 8,481
  4. Step 4: Simplify right side
    15,286.76x = 178,902,454.50
  5. Step 5: Solve for x
    x = 178,902,454.50/15,286.76
  6. Step 6: Final answer
    x = 11,703.10

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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.