Home / 21,108.83-29,128.97-11,546.79

Finding the Fourth Proportional to 21,108.83, 29,128.97 and 11,546.79

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Solution

The fourth proportional to 21,108.83, 29,128.97 and 11,546.79 is: 15,933.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,108.83 : 29,128.97 = 11,546.79 : x
  2. Step 2: Convert to fraction form
    21,108.83/29,128.97 = 11,546.79/x
  3. Step 3: Cross multiply
    21,108.83x = 29,128.97 × 11,546.79
  4. Step 4: Simplify right side
    21,108.83x = 336,346,041.77
  5. Step 5: Solve for x
    x = 336,346,041.77/21,108.83
  6. Step 6: Final answer
    x = 15,933.91

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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.