Home / 20,129.31-27,778.34-11,054.86

Finding the Fourth Proportional to 20,129.31, 27,778.34 and 11,054.86

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Solution

The fourth proportional to 20,129.31, 27,778.34 and 11,054.86 is: 15,255.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.31 : 27,778.34 = 11,054.86 : x
  2. Step 2: Convert to fraction form
    20,129.31/27,778.34 = 11,054.86/x
  3. Step 3: Cross multiply
    20,129.31x = 27,778.34 × 11,054.86
  4. Step 4: Simplify right side
    20,129.31x = 307,085,617.92
  5. Step 5: Solve for x
    x = 307,085,617.92/20,129.31
  6. Step 6: Final answer
    x = 15,255.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.