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Finding the Fourth Proportional to 12,170.54, 18,255.84 and 3,405.53

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Solution

The fourth proportional to 12,170.54, 18,255.84 and 3,405.53 is: 5,108.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,170.54 : 18,255.84 = 3,405.53 : x
  2. Step 2: Convert to fraction form
    12,170.54/18,255.84 = 3,405.53/x
  3. Step 3: Cross multiply
    12,170.54x = 18,255.84 × 3,405.53
  4. Step 4: Simplify right side
    12,170.54x = 62,170,810.80
  5. Step 5: Solve for x
    x = 62,170,810.80/12,170.54
  6. Step 6: Final answer
    x = 5,108.30

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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.