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Finding the Fourth Proportional to 22,139.80, 30,551.81 and 12,578.44

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Solution

The fourth proportional to 22,139.80, 30,551.81 and 12,578.44 is: 17,357.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,139.80 : 30,551.81 = 12,578.44 : x
  2. Step 2: Convert to fraction form
    22,139.80/30,551.81 = 12,578.44/x
  3. Step 3: Cross multiply
    22,139.80x = 30,551.81 × 12,578.44
  4. Step 4: Simplify right side
    22,139.80x = 384,294,064.04
  5. Step 5: Solve for x
    x = 384,294,064.04/22,139.80
  6. Step 6: Final answer
    x = 17,357.61

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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.