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Finding the Fourth Proportional to 15,872.35, 21,902.66 and 8,701.11

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Solution

The fourth proportional to 15,872.35, 21,902.66 and 8,701.11 is: 12,006.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,872.35 : 21,902.66 = 8,701.11 : x
  2. Step 2: Convert to fraction form
    15,872.35/21,902.66 = 8,701.11/x
  3. Step 3: Cross multiply
    15,872.35x = 21,902.66 × 8,701.11
  4. Step 4: Simplify right side
    15,872.35x = 190,577,525.21
  5. Step 5: Solve for x
    x = 190,577,525.21/15,872.35
  6. Step 6: Final answer
    x = 12,006.89

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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.