Home / 12,162.35-18,240.39-8,211.58

Finding the Fourth Proportional to 12,162.35, 18,240.39 and 8,211.58

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Solution

The fourth proportional to 12,162.35, 18,240.39 and 8,211.58 is: 12,315.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,162.35 : 18,240.39 = 8,211.58 : x
  2. Step 2: Convert to fraction form
    12,162.35/18,240.39 = 8,211.58/x
  3. Step 3: Cross multiply
    12,162.35x = 18,240.39 × 8,211.58
  4. Step 4: Simplify right side
    12,162.35x = 149,782,376.12
  5. Step 5: Solve for x
    x = 149,782,376.12/12,162.35
  6. Step 6: Final answer
    x = 12,315.25

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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.