Home / 21,010.61-28,994.13-11,579.10

Finding the Fourth Proportional to 21,010.61, 28,994.13 and 11,579.10

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Solution

The fourth proportional to 21,010.61, 28,994.13 and 11,579.10 is: 15,978.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.61 : 28,994.13 = 11,579.10 : x
  2. Step 2: Convert to fraction form
    21,010.61/28,994.13 = 11,579.10/x
  3. Step 3: Cross multiply
    21,010.61x = 28,994.13 × 11,579.10
  4. Step 4: Simplify right side
    21,010.61x = 335,725,930.68
  5. Step 5: Solve for x
    x = 335,725,930.68/21,010.61
  6. Step 6: Final answer
    x = 15,978.88

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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.