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Finding the Fourth Proportional to 12,388.84, 17,072.99 and 12,161.11

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Solution

The fourth proportional to 12,388.84, 17,072.99 and 12,161.11 is: 16,759.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,388.84 : 17,072.99 = 12,161.11 : x
  2. Step 2: Convert to fraction form
    12,388.84/17,072.99 = 12,161.11/x
  3. Step 3: Cross multiply
    12,388.84x = 17,072.99 × 12,161.11
  4. Step 4: Simplify right side
    12,388.84x = 207,626,497.14
  5. Step 5: Solve for x
    x = 207,626,497.14/12,388.84
  6. Step 6: Final answer
    x = 16,759.16

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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.