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Finding the Fourth Proportional to 16,884.80, 25,327.20 and 12,219.20

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Solution

The fourth proportional to 16,884.80, 25,327.20 and 12,219.20 is: 18,328.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,884.80 : 25,327.20 = 12,219.20 : x
  2. Step 2: Convert to fraction form
    16,884.80/25,327.20 = 12,219.20/x
  3. Step 3: Cross multiply
    16,884.80x = 25,327.20 × 12,219.20
  4. Step 4: Simplify right side
    16,884.80x = 309,478,122.24
  5. Step 5: Solve for x
    x = 309,478,122.24/16,884.80
  6. Step 6: Final answer
    x = 18,328.80

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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.