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Finding the Fourth Proportional to 12,243.01, 18,365.90 and 3,920.11

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Solution

The fourth proportional to 12,243.01, 18,365.90 and 3,920.11 is: 5,880.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,243.01 : 18,365.90 = 3,920.11 : x
  2. Step 2: Convert to fraction form
    12,243.01/18,365.90 = 3,920.11/x
  3. Step 3: Cross multiply
    12,243.01x = 18,365.90 × 3,920.11
  4. Step 4: Simplify right side
    12,243.01x = 71,996,348.25
  5. Step 5: Solve for x
    x = 71,996,348.25/12,243.01
  6. Step 6: Final answer
    x = 5,880.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.