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Finding the Fourth Proportional to 27,809.89, 38,378.26 and 15,872.98

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Solution

The fourth proportional to 27,809.89, 38,378.26 and 15,872.98 is: 21,905.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,809.89 : 38,378.26 = 15,872.98 : x
  2. Step 2: Convert to fraction form
    27,809.89/38,378.26 = 15,872.98/x
  3. Step 3: Cross multiply
    27,809.89x = 38,378.26 × 15,872.98
  4. Step 4: Simplify right side
    27,809.89x = 609,177,353.41
  5. Step 5: Solve for x
    x = 609,177,353.41/27,809.89
  6. Step 6: Final answer
    x = 21,905.06

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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.