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Finding the Fourth Proportional to 17,170.80, 25,756.20 and 5,485.20

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Solution

The fourth proportional to 17,170.80, 25,756.20 and 5,485.20 is: 8,227.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,170.80 : 25,756.20 = 5,485.20 : x
  2. Step 2: Convert to fraction form
    17,170.80/25,756.20 = 5,485.20/x
  3. Step 3: Cross multiply
    17,170.80x = 25,756.20 × 5,485.20
  4. Step 4: Simplify right side
    17,170.80x = 141,277,908.24
  5. Step 5: Solve for x
    x = 141,277,908.24/17,170.80
  6. Step 6: Final answer
    x = 8,227.80

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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.