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Finding the Fourth Proportional to 12,206, 16,845 and 7,429.40

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Solution

The fourth proportional to 12,206, 16,845 and 7,429.40 is: 10,253.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,206 : 16,845 = 7,429.40 : x
  2. Step 2: Convert to fraction form
    12,206/16,845 = 7,429.40/x
  3. Step 3: Cross multiply
    12,206x = 16,845 × 7,429.40
  4. Step 4: Simplify right side
    12,206x = 125,148,243
  5. Step 5: Solve for x
    x = 125,148,243/12,206
  6. Step 6: Final answer
    x = 10,253.01

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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.