Home / 20,918.50-31,375.45-6,127.56

Finding the Fourth Proportional to 20,918.50, 31,375.45 and 6,127.56

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Solution

The fourth proportional to 20,918.50, 31,375.45 and 6,127.56 is: 9,190.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.50 : 31,375.45 = 6,127.56 : x
  2. Step 2: Convert to fraction form
    20,918.50/31,375.45 = 6,127.56/x
  3. Step 3: Cross multiply
    20,918.50x = 31,375.45 × 6,127.56
  4. Step 4: Simplify right side
    20,918.50x = 192,254,952.40
  5. Step 5: Solve for x
    x = 192,254,952.40/20,918.50
  6. Step 6: Final answer
    x = 9,190.67

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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.