Home / 12,218.15-16,861.38-6,912.85

Finding the Fourth Proportional to 12,218.15, 16,861.38 and 6,912.85

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Solution

The fourth proportional to 12,218.15, 16,861.38 and 6,912.85 is: 9,539.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,218.15 : 16,861.38 = 6,912.85 : x
  2. Step 2: Convert to fraction form
    12,218.15/16,861.38 = 6,912.85/x
  3. Step 3: Cross multiply
    12,218.15x = 16,861.38 × 6,912.85
  4. Step 4: Simplify right side
    12,218.15x = 116,560,071.86
  5. Step 5: Solve for x
    x = 116,560,071.86/12,218.15
  6. Step 6: Final answer
    x = 9,539.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.