Home / 20,769.56-31,167.30-8,457.56

Finding the Fourth Proportional to 20,769.56, 31,167.30 and 8,457.56

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Solution

The fourth proportional to 20,769.56, 31,167.30 and 8,457.56 is: 12,691.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,769.56 : 31,167.30 = 8,457.56 : x
  2. Step 2: Convert to fraction form
    20,769.56/31,167.30 = 8,457.56/x
  3. Step 3: Cross multiply
    20,769.56x = 31,167.30 × 8,457.56
  4. Step 4: Simplify right side
    20,769.56x = 263,599,419.42
  5. Step 5: Solve for x
    x = 263,599,419.42/20,769.56
  6. Step 6: Final answer
    x = 12,691.62

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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.