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Finding the Fourth Proportional to 22,396.30, 30,905.02 and 13,196.40

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Solution

The fourth proportional to 22,396.30, 30,905.02 and 13,196.40 is: 18,209.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,396.30 : 30,905.02 = 13,196.40 : x
  2. Step 2: Convert to fraction form
    22,396.30/30,905.02 = 13,196.40/x
  3. Step 3: Cross multiply
    22,396.30x = 30,905.02 × 13,196.40
  4. Step 4: Simplify right side
    22,396.30x = 407,834,936.31
  5. Step 5: Solve for x
    x = 407,834,936.31/22,396.30
  6. Step 6: Final answer
    x = 18,209.92

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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.