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Finding the Fourth Proportional to 19,691.33, 27,158.68 and 12,618.41

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Solution

The fourth proportional to 19,691.33, 27,158.68 and 12,618.41 is: 17,403.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,691.33 : 27,158.68 = 12,618.41 : x
  2. Step 2: Convert to fraction form
    19,691.33/27,158.68 = 12,618.41/x
  3. Step 3: Cross multiply
    19,691.33x = 27,158.68 × 12,618.41
  4. Step 4: Simplify right side
    19,691.33x = 342,699,395.65
  5. Step 5: Solve for x
    x = 342,699,395.65/19,691.33
  6. Step 6: Final answer
    x = 17,403.57

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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.