Home / 20,766.70-31,161.39-9,678.61

Finding the Fourth Proportional to 20,766.70, 31,161.39 and 9,678.61

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Solution

The fourth proportional to 20,766.70, 31,161.39 and 9,678.61 is: 14,523.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,766.70 : 31,161.39 = 9,678.61 : x
  2. Step 2: Convert to fraction form
    20,766.70/31,161.39 = 9,678.61/x
  3. Step 3: Cross multiply
    20,766.70x = 31,161.39 × 9,678.61
  4. Step 4: Simplify right side
    20,766.70x = 301,598,940.87
  5. Step 5: Solve for x
    x = 301,598,940.87/20,766.70
  6. Step 6: Final answer
    x = 14,523.20

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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.