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Finding the Fourth Proportional to 13,608, 18,781.20 and 8,017.92

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Solution

The fourth proportional to 13,608, 18,781.20 and 8,017.92 is: 11,066.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608 : 18,781.20 = 8,017.92 : x
  2. Step 2: Convert to fraction form
    13,608/18,781.20 = 8,017.92/x
  3. Step 3: Cross multiply
    13,608x = 18,781.20 × 8,017.92
  4. Step 4: Simplify right side
    13,608x = 150,586,159.10
  5. Step 5: Solve for x
    x = 150,586,159.10/13,608
  6. Step 6: Final answer
    x = 11,066.00

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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.