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Finding the Fourth Proportional to 22,310.54, 30,788.60 and 12,879.10

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Solution

The fourth proportional to 22,310.54, 30,788.60 and 12,879.10 is: 17,773.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,310.54 : 30,788.60 = 12,879.10 : x
  2. Step 2: Convert to fraction form
    22,310.54/30,788.60 = 12,879.10/x
  3. Step 3: Cross multiply
    22,310.54x = 30,788.60 × 12,879.10
  4. Step 4: Simplify right side
    22,310.54x = 396,529,458.26
  5. Step 5: Solve for x
    x = 396,529,458.26/22,310.54
  6. Step 6: Final answer
    x = 17,773.19

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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.