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Finding the Fourth Proportional to 18,137.69, 27,206.71 and 5,487.55

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Solution

The fourth proportional to 18,137.69, 27,206.71 and 5,487.55 is: 8,231.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,137.69 : 27,206.71 = 5,487.55 : x
  2. Step 2: Convert to fraction form
    18,137.69/27,206.71 = 5,487.55/x
  3. Step 3: Cross multiply
    18,137.69x = 27,206.71 × 5,487.55
  4. Step 4: Simplify right side
    18,137.69x = 149,298,172.55
  5. Step 5: Solve for x
    x = 149,298,172.55/18,137.69
  6. Step 6: Final answer
    x = 8,231.38

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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.