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Finding the Fourth Proportional to 18,376.10, 27,578.55 and 8,516.60

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Solution

The fourth proportional to 18,376.10, 27,578.55 and 8,516.60 is: 12,781.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,376.10 : 27,578.55 = 8,516.60 : x
  2. Step 2: Convert to fraction form
    18,376.10/27,578.55 = 8,516.60/x
  3. Step 3: Cross multiply
    18,376.10x = 27,578.55 × 8,516.60
  4. Step 4: Simplify right side
    18,376.10x = 234,875,478.93
  5. Step 5: Solve for x
    x = 234,875,478.93/18,376.10
  6. Step 6: Final answer
    x = 12,781.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.