Home / 21,201.48-31,789.77-8,054.78

Finding the Fourth Proportional to 21,201.48, 31,789.77 and 8,054.78

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Solution

The fourth proportional to 21,201.48, 31,789.77 and 8,054.78 is: 12,077.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,201.48 : 31,789.77 = 8,054.78 : x
  2. Step 2: Convert to fraction form
    21,201.48/31,789.77 = 8,054.78/x
  3. Step 3: Cross multiply
    21,201.48x = 31,789.77 × 8,054.78
  4. Step 4: Simplify right side
    21,201.48x = 256,059,414.45
  5. Step 5: Solve for x
    x = 256,059,414.45/21,201.48
  6. Step 6: Final answer
    x = 12,077.43

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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.