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Finding the Fourth Proportional to 12,505.91, 18,772.07 and 12,223.55

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Solution

The fourth proportional to 12,505.91, 18,772.07 and 12,223.55 is: 18,348.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,505.91 : 18,772.07 = 12,223.55 : x
  2. Step 2: Convert to fraction form
    12,505.91/18,772.07 = 12,223.55/x
  3. Step 3: Cross multiply
    12,505.91x = 18,772.07 × 12,223.55
  4. Step 4: Simplify right side
    12,505.91x = 229,461,272.95
  5. Step 5: Solve for x
    x = 229,461,272.95/12,505.91
  6. Step 6: Final answer
    x = 18,348.23

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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.