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Finding the Fourth Proportional to 21,550.39, 29,736.07 and 12,118.39

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Solution

The fourth proportional to 21,550.39, 29,736.07 and 12,118.39 is: 16,721.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,550.39 : 29,736.07 = 12,118.39 : x
  2. Step 2: Convert to fraction form
    21,550.39/29,736.07 = 12,118.39/x
  3. Step 3: Cross multiply
    21,550.39x = 29,736.07 × 12,118.39
  4. Step 4: Simplify right side
    21,550.39x = 360,353,293.33
  5. Step 5: Solve for x
    x = 360,353,293.33/21,550.39
  6. Step 6: Final answer
    x = 16,721.43

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1.5x scale

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.