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Finding the Fourth Proportional to 18,752.54, 28,136.57 and 8,217.12

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Solution

The fourth proportional to 18,752.54, 28,136.57 and 8,217.12 is: 12,329.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,752.54 : 28,136.57 = 8,217.12 : x
  2. Step 2: Convert to fraction form
    18,752.54/28,136.57 = 8,217.12/x
  3. Step 3: Cross multiply
    18,752.54x = 28,136.57 × 8,217.12
  4. Step 4: Simplify right side
    18,752.54x = 231,201,530.99
  5. Step 5: Solve for x
    x = 231,201,530.99/18,752.54
  6. Step 6: Final answer
    x = 12,329.08

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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.