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Finding the Fourth Proportional to 18,716.03, 28,073.99 and 7,620.11

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Solution

The fourth proportional to 18,716.03, 28,073.99 and 7,620.11 is: 11,430.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,716.03 : 28,073.99 = 7,620.11 : x
  2. Step 2: Convert to fraction form
    18,716.03/28,073.99 = 7,620.11/x
  3. Step 3: Cross multiply
    18,716.03x = 28,073.99 × 7,620.11
  4. Step 4: Simplify right side
    18,716.03x = 213,926,875.90
  5. Step 5: Solve for x
    x = 213,926,875.90/18,716.03
  6. Step 6: Final answer
    x = 11,430.14

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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.