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Finding the Fourth Proportional to 22,144.80, 30,559.92 and 13,196.80

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Solution

The fourth proportional to 22,144.80, 30,559.92 and 13,196.80 is: 18,211.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,144.80 : 30,559.92 = 13,196.80 : x
  2. Step 2: Convert to fraction form
    22,144.80/30,559.92 = 13,196.80/x
  3. Step 3: Cross multiply
    22,144.80x = 30,559.92 × 13,196.80
  4. Step 4: Simplify right side
    22,144.80x = 403,293,152.26
  5. Step 5: Solve for x
    x = 403,293,152.26/22,144.80
  6. Step 6: Final answer
    x = 18,211.64

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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.