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Finding the Fourth Proportional to 15,838.44, 21,858.15 and 8,765.31

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Solution

The fourth proportional to 15,838.44, 21,858.15 and 8,765.31 is: 12,096.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,838.44 : 21,858.15 = 8,765.31 : x
  2. Step 2: Convert to fraction form
    15,838.44/21,858.15 = 8,765.31/x
  3. Step 3: Cross multiply
    15,838.44x = 21,858.15 × 8,765.31
  4. Step 4: Simplify right side
    15,838.44x = 191,593,575.61
  5. Step 5: Solve for x
    x = 191,593,575.61/15,838.44
  6. Step 6: Final answer
    x = 12,096.75

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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.