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Finding the Fourth Proportional to 15,793.65, 21,787.79 and 9,416.61

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Solution

The fourth proportional to 15,793.65, 21,787.79 and 9,416.61 is: 12,990.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,793.65 : 21,787.79 = 9,416.61 : x
  2. Step 2: Convert to fraction form
    15,793.65/21,787.79 = 9,416.61/x
  3. Step 3: Cross multiply
    15,793.65x = 21,787.79 × 9,416.61
  4. Step 4: Simplify right side
    15,793.65x = 205,167,074.11
  5. Step 5: Solve for x
    x = 205,167,074.11/15,793.65
  6. Step 6: Final answer
    x = 12,990.48

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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.