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Finding the Fourth Proportional to 22,371.88, 30,878.96 and 12,945.92

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Solution

The fourth proportional to 22,371.88, 30,878.96 and 12,945.92 is: 17,868.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,371.88 : 30,878.96 = 12,945.92 : x
  2. Step 2: Convert to fraction form
    22,371.88/30,878.96 = 12,945.92/x
  3. Step 3: Cross multiply
    22,371.88x = 30,878.96 × 12,945.92
  4. Step 4: Simplify right side
    22,371.88x = 399,756,545.84
  5. Step 5: Solve for x
    x = 399,756,545.84/22,371.88
  6. Step 6: Final answer
    x = 17,868.71

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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.