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Finding the Fourth Proportional to 19,766.65, 27,279.18 and 11,385.85

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Solution

The fourth proportional to 19,766.65, 27,279.18 and 11,385.85 is: 15,713.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,766.65 : 27,279.18 = 11,385.85 : x
  2. Step 2: Convert to fraction form
    19,766.65/27,279.18 = 11,385.85/x
  3. Step 3: Cross multiply
    19,766.65x = 27,279.18 × 11,385.85
  4. Step 4: Simplify right side
    19,766.65x = 310,596,458.28
  5. Step 5: Solve for x
    x = 310,596,458.28/19,766.65
  6. Step 6: Final answer
    x = 15,713.16

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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.