Home / 20,786.31-31,189.89-9,693.87

Finding the Fourth Proportional to 20,786.31, 31,189.89 and 9,693.87

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Solution

The fourth proportional to 20,786.31, 31,189.89 and 9,693.87 is: 14,545.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.31 : 31,189.89 = 9,693.87 : x
  2. Step 2: Convert to fraction form
    20,786.31/31,189.89 = 9,693.87/x
  3. Step 3: Cross multiply
    20,786.31x = 31,189.89 × 9,693.87
  4. Step 4: Simplify right side
    20,786.31x = 302,350,738.97
  5. Step 5: Solve for x
    x = 302,350,738.97/20,786.31
  6. Step 6: Final answer
    x = 14,545.67

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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.