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Finding the Fourth Proportional to 18,433.81, 27,636.13 and 13,168.81

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Solution

The fourth proportional to 18,433.81, 27,636.13 and 13,168.81 is: 19,742.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,433.81 : 27,636.13 = 13,168.81 : x
  2. Step 2: Convert to fraction form
    18,433.81/27,636.13 = 13,168.81/x
  3. Step 3: Cross multiply
    18,433.81x = 27,636.13 × 13,168.81
  4. Step 4: Simplify right side
    18,433.81x = 363,934,945.11
  5. Step 5: Solve for x
    x = 363,934,945.11/18,433.81
  6. Step 6: Final answer
    x = 19,742.80

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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.