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Finding the Fourth Proportional to 18,801.67, 28,192.10 and 7,716.16

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Solution

The fourth proportional to 18,801.67, 28,192.10 and 7,716.16 is: 11,569.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,801.67 : 28,192.10 = 7,716.16 : x
  2. Step 2: Convert to fraction form
    18,801.67/28,192.10 = 7,716.16/x
  3. Step 3: Cross multiply
    18,801.67x = 28,192.10 × 7,716.16
  4. Step 4: Simplify right side
    18,801.67x = 217,534,794.40
  5. Step 5: Solve for x
    x = 217,534,794.40/18,801.67
  6. Step 6: Final answer
    x = 11,569.97

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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.