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Finding the Fourth Proportional to 15,321.50, 21,145.49 and 8,607.14

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Solution

The fourth proportional to 15,321.50, 21,145.49 and 8,607.14 is: 11,878.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,321.50 : 21,145.49 = 8,607.14 : x
  2. Step 2: Convert to fraction form
    15,321.50/21,145.49 = 8,607.14/x
  3. Step 3: Cross multiply
    15,321.50x = 21,145.49 × 8,607.14
  4. Step 4: Simplify right side
    15,321.50x = 182,002,192.80
  5. Step 5: Solve for x
    x = 182,002,192.80/15,321.50
  6. Step 6: Final answer
    x = 11,878.88

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.