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Finding the Fourth Proportional to 19,799.64, 29,682.18 and 7,479

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Solution

The fourth proportional to 19,799.64, 29,682.18 and 7,479 is: 11,211.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,799.64 : 29,682.18 = 7,479 : x
  2. Step 2: Convert to fraction form
    19,799.64/29,682.18 = 7,479/x
  3. Step 3: Cross multiply
    19,799.64x = 29,682.18 × 7,479
  4. Step 4: Simplify right side
    19,799.64x = 221,993,024.22
  5. Step 5: Solve for x
    x = 221,993,024.22/19,799.64
  6. Step 6: Final answer
    x = 11,211.97

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.