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Finding the Fourth Proportional to 22,243.92, 30,694.84 and 12,813.20

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Solution

The fourth proportional to 22,243.92, 30,694.84 and 12,813.20 is: 17,681.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,243.92 : 30,694.84 = 12,813.20 : x
  2. Step 2: Convert to fraction form
    22,243.92/30,694.84 = 12,813.20/x
  3. Step 3: Cross multiply
    22,243.92x = 30,694.84 × 12,813.20
  4. Step 4: Simplify right side
    22,243.92x = 393,299,123.89
  5. Step 5: Solve for x
    x = 393,299,123.89/22,243.92
  6. Step 6: Final answer
    x = 17,681.20

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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.