Home / 21,027.85-31,542.38-5,445.47

Finding the Fourth Proportional to 21,027.85, 31,542.38 and 5,445.47

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Solution

The fourth proportional to 21,027.85, 31,542.38 and 5,445.47 is: 8,168.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,027.85 : 31,542.38 = 5,445.47 : x
  2. Step 2: Convert to fraction form
    21,027.85/31,542.38 = 5,445.47/x
  3. Step 3: Cross multiply
    21,027.85x = 31,542.38 × 5,445.47
  4. Step 4: Simplify right side
    21,027.85x = 171,763,135.65
  5. Step 5: Solve for x
    x = 171,763,135.65/21,027.85
  6. Step 6: Final answer
    x = 8,168.37

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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.