Home / 20,739.24-31,113.72-11,976.66

Finding the Fourth Proportional to 20,739.24, 31,113.72 and 11,976.66

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Solution

The fourth proportional to 20,739.24, 31,113.72 and 11,976.66 is: 17,967.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.24 : 31,113.72 = 11,976.66 : x
  2. Step 2: Convert to fraction form
    20,739.24/31,113.72 = 11,976.66/x
  3. Step 3: Cross multiply
    20,739.24x = 31,113.72 × 11,976.66
  4. Step 4: Simplify right side
    20,739.24x = 372,638,445.78
  5. Step 5: Solve for x
    x = 372,638,445.78/20,739.24
  6. Step 6: Final answer
    x = 17,967.80

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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.