Home / 20,898.78-31,328.01-7,040.22

Finding the Fourth Proportional to 20,898.78, 31,328.01 and 7,040.22

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Solution

The fourth proportional to 20,898.78, 31,328.01 and 7,040.22 is: 10,553.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,898.78 : 31,328.01 = 7,040.22 : x
  2. Step 2: Convert to fraction form
    20,898.78/31,328.01 = 7,040.22/x
  3. Step 3: Cross multiply
    20,898.78x = 31,328.01 × 7,040.22
  4. Step 4: Simplify right side
    20,898.78x = 220,556,082.56
  5. Step 5: Solve for x
    x = 220,556,082.56/20,898.78
  6. Step 6: Final answer
    x = 10,553.54

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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.