Home / 21,645.36-29,871.45-12,691.62

Finding the Fourth Proportional to 21,645.36, 29,871.45 and 12,691.62

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Solution

The fourth proportional to 21,645.36, 29,871.45 and 12,691.62 is: 17,514.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,645.36 : 29,871.45 = 12,691.62 : x
  2. Step 2: Convert to fraction form
    21,645.36/29,871.45 = 12,691.62/x
  3. Step 3: Cross multiply
    21,645.36x = 29,871.45 × 12,691.62
  4. Step 4: Simplify right side
    21,645.36x = 379,117,092.25
  5. Step 5: Solve for x
    x = 379,117,092.25/21,645.36
  6. Step 6: Final answer
    x = 17,514.94

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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.