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Finding the Fourth Proportional to 16,878.28, 25,321 and 5,781.99

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Solution

The fourth proportional to 16,878.28, 25,321 and 5,781.99 is: 8,674.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,878.28 : 25,321 = 5,781.99 : x
  2. Step 2: Convert to fraction form
    16,878.28/25,321 = 5,781.99/x
  3. Step 3: Cross multiply
    16,878.28x = 25,321 × 5,781.99
  4. Step 4: Simplify right side
    16,878.28x = 146,405,768.79
  5. Step 5: Solve for x
    x = 146,405,768.79/16,878.28
  6. Step 6: Final answer
    x = 8,674.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.