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Finding the Fourth Proportional to 17,891.72, 26,842.44 and 12,730.40

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Solution

The fourth proportional to 17,891.72, 26,842.44 and 12,730.40 is: 19,099.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,891.72 : 26,842.44 = 12,730.40 : x
  2. Step 2: Convert to fraction form
    17,891.72/26,842.44 = 12,730.40/x
  3. Step 3: Cross multiply
    17,891.72x = 26,842.44 × 12,730.40
  4. Step 4: Simplify right side
    17,891.72x = 341,714,998.18
  5. Step 5: Solve for x
    x = 341,714,998.18/17,891.72
  6. Step 6: Final answer
    x = 19,099.06

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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.