Home / 10,912.40-16,336.20-7,218.80

Finding the Fourth Proportional to 10,912.40, 16,336.20 and 7,218.80

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Solution

The fourth proportional to 10,912.40, 16,336.20 and 7,218.80 is: 10,806.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,912.40 : 16,336.20 = 7,218.80 : x
  2. Step 2: Convert to fraction form
    10,912.40/16,336.20 = 7,218.80/x
  3. Step 3: Cross multiply
    10,912.40x = 16,336.20 × 7,218.80
  4. Step 4: Simplify right side
    10,912.40x = 117,927,760.56
  5. Step 5: Solve for x
    x = 117,927,760.56/10,912.40
  6. Step 6: Final answer
    x = 10,806.77

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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.