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Finding the Fourth Proportional to 18,787.90, 28,185.10 and 6,309.13

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Solution

The fourth proportional to 18,787.90, 28,185.10 and 6,309.13 is: 9,464.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,787.90 : 28,185.10 = 6,309.13 : x
  2. Step 2: Convert to fraction form
    18,787.90/28,185.10 = 6,309.13/x
  3. Step 3: Cross multiply
    18,787.90x = 28,185.10 × 6,309.13
  4. Step 4: Simplify right side
    18,787.90x = 177,823,459.96
  5. Step 5: Solve for x
    x = 177,823,459.96/18,787.90
  6. Step 6: Final answer
    x = 9,464.79

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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.