Home / 21,342.30-29,451.60-11,781.98

Finding the Fourth Proportional to 21,342.30, 29,451.60 and 11,781.98

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Solution

The fourth proportional to 21,342.30, 29,451.60 and 11,781.98 is: 16,258.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,342.30 : 29,451.60 = 11,781.98 : x
  2. Step 2: Convert to fraction form
    21,342.30/29,451.60 = 11,781.98/x
  3. Step 3: Cross multiply
    21,342.30x = 29,451.60 × 11,781.98
  4. Step 4: Simplify right side
    21,342.30x = 346,998,103.26
  5. Step 5: Solve for x
    x = 346,998,103.26/21,342.30
  6. Step 6: Final answer
    x = 16,258.71

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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.