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Finding the Fourth Proportional to 22,310.64, 30,788.68 and 12,879.20

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Solution

The fourth proportional to 22,310.64, 30,788.68 and 12,879.20 is: 17,773.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,310.64 : 30,788.68 = 12,879.20 : x
  2. Step 2: Convert to fraction form
    22,310.64/30,788.68 = 12,879.20/x
  3. Step 3: Cross multiply
    22,310.64x = 30,788.68 × 12,879.20
  4. Step 4: Simplify right side
    22,310.64x = 396,533,567.46
  5. Step 5: Solve for x
    x = 396,533,567.46/22,310.64
  6. Step 6: Final answer
    x = 17,773.29

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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.