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Finding the Fourth Proportional to 22,369.15, 30,869.49 and 12,809.19

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Solution

The fourth proportional to 22,369.15, 30,869.49 and 12,809.19 is: 17,676.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,369.15 : 30,869.49 = 12,809.19 : x
  2. Step 2: Convert to fraction form
    22,369.15/30,869.49 = 12,809.19/x
  3. Step 3: Cross multiply
    22,369.15x = 30,869.49 × 12,809.19
  4. Step 4: Simplify right side
    22,369.15x = 395,413,008.27
  5. Step 5: Solve for x
    x = 395,413,008.27/22,369.15
  6. Step 6: Final answer
    x = 17,676.71

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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.