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Finding the Fourth Proportional to 18,817.99, 25,972.25 and 12,847.48

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Solution

The fourth proportional to 18,817.99, 25,972.25 and 12,847.48 is: 17,731.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,817.99 : 25,972.25 = 12,847.48 : x
  2. Step 2: Convert to fraction form
    18,817.99/25,972.25 = 12,847.48/x
  3. Step 3: Cross multiply
    18,817.99x = 25,972.25 × 12,847.48
  4. Step 4: Simplify right side
    18,817.99x = 333,677,833.26
  5. Step 5: Solve for x
    x = 333,677,833.26/18,817.99
  6. Step 6: Final answer
    x = 17,731.86

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1.5x scale

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.