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Finding the Fourth Proportional to 17,170.80, 25,756.20 and 12,213.60

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Solution

The fourth proportional to 17,170.80, 25,756.20 and 12,213.60 is: 18,320.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,170.80 : 25,756.20 = 12,213.60 : x
  2. Step 2: Convert to fraction form
    17,170.80/25,756.20 = 12,213.60/x
  3. Step 3: Cross multiply
    17,170.80x = 25,756.20 × 12,213.60
  4. Step 4: Simplify right side
    17,170.80x = 314,575,924.32
  5. Step 5: Solve for x
    x = 314,575,924.32/17,170.80
  6. Step 6: Final answer
    x = 18,320.40

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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.