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Finding the Fourth Proportional to 22,419.96, 30,939.65 and 12,860.22

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Solution

The fourth proportional to 22,419.96, 30,939.65 and 12,860.22 is: 17,747.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,419.96 : 30,939.65 = 12,860.22 : x
  2. Step 2: Convert to fraction form
    22,419.96/30,939.65 = 12,860.22/x
  3. Step 3: Cross multiply
    22,419.96x = 30,939.65 × 12,860.22
  4. Step 4: Simplify right side
    22,419.96x = 397,890,641.42
  5. Step 5: Solve for x
    x = 397,890,641.42/22,419.96
  6. Step 6: Final answer
    x = 17,747.16

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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.