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Finding the Fourth Proportional to 15,832.50, 21,855.57 and 9,867.12

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Solution

The fourth proportional to 15,832.50, 21,855.57 and 9,867.12 is: 13,620.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,832.50 : 21,855.57 = 9,867.12 : x
  2. Step 2: Convert to fraction form
    15,832.50/21,855.57 = 9,867.12/x
  3. Step 3: Cross multiply
    15,832.50x = 21,855.57 × 9,867.12
  4. Step 4: Simplify right side
    15,832.50x = 215,651,531.86
  5. Step 5: Solve for x
    x = 215,651,531.86/15,832.50
  6. Step 6: Final answer
    x = 13,620.81

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.