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Finding the Fourth Proportional to 16,978.20, 25,416.10 and 14,930.20

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Solution

The fourth proportional to 16,978.20, 25,416.10 and 14,930.20 is: 22,350.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,978.20 : 25,416.10 = 14,930.20 : x
  2. Step 2: Convert to fraction form
    16,978.20/25,416.10 = 14,930.20/x
  3. Step 3: Cross multiply
    16,978.20x = 25,416.10 × 14,930.20
  4. Step 4: Simplify right side
    16,978.20x = 379,467,456.22
  5. Step 5: Solve for x
    x = 379,467,456.22/16,978.20
  6. Step 6: Final answer
    x = 22,350.28

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1.5x scale

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.