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Finding the Fourth Proportional to 22,379.58, 30,884.62 and 12,308.80

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Solution

The fourth proportional to 22,379.58, 30,884.62 and 12,308.80 is: 16,986.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,379.58 : 30,884.62 = 12,308.80 : x
  2. Step 2: Convert to fraction form
    22,379.58/30,884.62 = 12,308.80/x
  3. Step 3: Cross multiply
    22,379.58x = 30,884.62 × 12,308.80
  4. Step 4: Simplify right side
    22,379.58x = 380,152,610.66
  5. Step 5: Solve for x
    x = 380,152,610.66/22,379.58
  6. Step 6: Final answer
    x = 16,986.58

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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.