Home / 21,318.25-29,419.20-11,886.61

Finding the Fourth Proportional to 21,318.25, 29,419.20 and 11,886.61

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Solution

The fourth proportional to 21,318.25, 29,419.20 and 11,886.61 is: 16,403.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,318.25 : 29,419.20 = 11,886.61 : x
  2. Step 2: Convert to fraction form
    21,318.25/29,419.20 = 11,886.61/x
  3. Step 3: Cross multiply
    21,318.25x = 29,419.20 × 11,886.61
  4. Step 4: Simplify right side
    21,318.25x = 349,694,556.91
  5. Step 5: Solve for x
    x = 349,694,556.91/21,318.25
  6. Step 6: Final answer
    x = 16,403.53

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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.