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Finding the Fourth Proportional to 22,379.42, 30,881.84 and 12,946.16

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Solution

The fourth proportional to 22,379.42, 30,881.84 and 12,946.16 is: 17,864.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,379.42 : 30,881.84 = 12,946.16 : x
  2. Step 2: Convert to fraction form
    22,379.42/30,881.84 = 12,946.16/x
  3. Step 3: Cross multiply
    22,379.42x = 30,881.84 × 12,946.16
  4. Step 4: Simplify right side
    22,379.42x = 399,801,241.73
  5. Step 5: Solve for x
    x = 399,801,241.73/22,379.42
  6. Step 6: Final answer
    x = 17,864.68

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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.