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Finding the Fourth Proportional to 16,975.90, 25,467.90 and 8,657.20

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Solution

The fourth proportional to 16,975.90, 25,467.90 and 8,657.20 is: 12,987.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,975.90 : 25,467.90 = 8,657.20 : x
  2. Step 2: Convert to fraction form
    16,975.90/25,467.90 = 8,657.20/x
  3. Step 3: Cross multiply
    16,975.90x = 25,467.90 × 8,657.20
  4. Step 4: Simplify right side
    16,975.90x = 220,480,703.88
  5. Step 5: Solve for x
    x = 220,480,703.88/16,975.90
  6. Step 6: Final answer
    x = 12,987.87

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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.