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Finding the Fourth Proportional to 17,099.90, 25,621.05 and 8,315.90

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Solution

The fourth proportional to 17,099.90, 25,621.05 and 8,315.90 is: 12,459.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,099.90 : 25,621.05 = 8,315.90 : x
  2. Step 2: Convert to fraction form
    17,099.90/25,621.05 = 8,315.90/x
  3. Step 3: Cross multiply
    17,099.90x = 25,621.05 × 8,315.90
  4. Step 4: Simplify right side
    17,099.90x = 213,062,089.70
  5. Step 5: Solve for x
    x = 213,062,089.70/17,099.90
  6. Step 6: Final answer
    x = 12,459.84

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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.