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Finding the Fourth Proportional to 18,616.68, 25,684.74 and 11,061

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Solution

The fourth proportional to 18,616.68, 25,684.74 and 11,061 is: 15,260.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,616.68 : 25,684.74 = 11,061 : x
  2. Step 2: Convert to fraction form
    18,616.68/25,684.74 = 11,061/x
  3. Step 3: Cross multiply
    18,616.68x = 25,684.74 × 11,061
  4. Step 4: Simplify right side
    18,616.68x = 284,098,909.14
  5. Step 5: Solve for x
    x = 284,098,909.14/18,616.68
  6. Step 6: Final answer
    x = 15,260.45

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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.