Home / 21,531.52-29,713.62-11,971.54

Finding the Fourth Proportional to 21,531.52, 29,713.62 and 11,971.54

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Solution

The fourth proportional to 21,531.52, 29,713.62 and 11,971.54 is: 16,520.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,531.52 : 29,713.62 = 11,971.54 : x
  2. Step 2: Convert to fraction form
    21,531.52/29,713.62 = 11,971.54/x
  3. Step 3: Cross multiply
    21,531.52x = 29,713.62 × 11,971.54
  4. Step 4: Simplify right side
    21,531.52x = 355,717,790.37
  5. Step 5: Solve for x
    x = 355,717,790.37/21,531.52
  6. Step 6: Final answer
    x = 16,520.79

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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.