Home / 21,132.76-31,668.90-11,879.32

Finding the Fourth Proportional to 21,132.76, 31,668.90 and 11,879.32

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Solution

The fourth proportional to 21,132.76, 31,668.90 and 11,879.32 is: 17,801.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,132.76 : 31,668.90 = 11,879.32 : x
  2. Step 2: Convert to fraction form
    21,132.76/31,668.90 = 11,879.32/x
  3. Step 3: Cross multiply
    21,132.76x = 31,668.90 × 11,879.32
  4. Step 4: Simplify right side
    21,132.76x = 376,204,997.15
  5. Step 5: Solve for x
    x = 376,204,997.15/21,132.76
  6. Step 6: Final answer
    x = 17,801.98

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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.