Home / 20,914.60-31,371.90-7,769.80

Finding the Fourth Proportional to 20,914.60, 31,371.90 and 7,769.80

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Solution

The fourth proportional to 20,914.60, 31,371.90 and 7,769.80 is: 11,654.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,914.60 : 31,371.90 = 7,769.80 : x
  2. Step 2: Convert to fraction form
    20,914.60/31,371.90 = 7,769.80/x
  3. Step 3: Cross multiply
    20,914.60x = 31,371.90 × 7,769.80
  4. Step 4: Simplify right side
    20,914.60x = 243,753,388.62
  5. Step 5: Solve for x
    x = 243,753,388.62/20,914.60
  6. Step 6: Final answer
    x = 11,654.70

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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.