Home / 8,906.20-13,359.30-7,811.80

Finding the Fourth Proportional to 8,906.20, 13,359.30 and 7,811.80

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Solution

The fourth proportional to 8,906.20, 13,359.30 and 7,811.80 is: 11,717.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,906.20 : 13,359.30 = 7,811.80 : x
  2. Step 2: Convert to fraction form
    8,906.20/13,359.30 = 7,811.80/x
  3. Step 3: Cross multiply
    8,906.20x = 13,359.30 × 7,811.80
  4. Step 4: Simplify right side
    8,906.20x = 104,360,179.74
  5. Step 5: Solve for x
    x = 104,360,179.74/8,906.20
  6. Step 6: Final answer
    x = 11,717.70

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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.