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Finding the Fourth Proportional to 34,687.65, 47,868.78 and 18,771.96

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Solution

The fourth proportional to 34,687.65, 47,868.78 and 18,771.96 is: 25,905.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,687.65 : 47,868.78 = 18,771.96 : x
  2. Step 2: Convert to fraction form
    34,687.65/47,868.78 = 18,771.96/x
  3. Step 3: Cross multiply
    34,687.65x = 47,868.78 × 18,771.96
  4. Step 4: Simplify right side
    34,687.65x = 898,590,823.41
  5. Step 5: Solve for x
    x = 898,590,823.41/34,687.65
  6. Step 6: Final answer
    x = 25,905.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.