Home / 12,170.56-18,255.88-3,405.44

Finding the Fourth Proportional to 12,170.56, 18,255.88 and 3,405.44

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Solution

The fourth proportional to 12,170.56, 18,255.88 and 3,405.44 is: 5,108.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,170.56 : 18,255.88 = 3,405.44 : x
  2. Step 2: Convert to fraction form
    12,170.56/18,255.88 = 3,405.44/x
  3. Step 3: Cross multiply
    12,170.56x = 18,255.88 × 3,405.44
  4. Step 4: Simplify right side
    12,170.56x = 62,169,303.99
  5. Step 5: Solve for x
    x = 62,169,303.99/12,170.56
  6. Step 6: Final answer
    x = 5,108.17

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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.