Home / 21,012.96-28,997.82-11,581.52

Finding the Fourth Proportional to 21,012.96, 28,997.82 and 11,581.52

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Solution

The fourth proportional to 21,012.96, 28,997.82 and 11,581.52 is: 15,982.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012.96 : 28,997.82 = 11,581.52 : x
  2. Step 2: Convert to fraction form
    21,012.96/28,997.82 = 11,581.52/x
  3. Step 3: Cross multiply
    21,012.96x = 28,997.82 × 11,581.52
  4. Step 4: Simplify right side
    21,012.96x = 335,838,832.29
  5. Step 5: Solve for x
    x = 335,838,832.29/21,012.96
  6. Step 6: Final answer
    x = 15,982.46

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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.