Home / 21,010.74-28,994.82-11,579.31

Finding the Fourth Proportional to 21,010.74, 28,994.82 and 11,579.31

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Solution

The fourth proportional to 21,010.74, 28,994.82 and 11,579.31 is: 15,979.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.74 : 28,994.82 = 11,579.31 : x
  2. Step 2: Convert to fraction form
    21,010.74/28,994.82 = 11,579.31/x
  3. Step 3: Cross multiply
    21,010.74x = 28,994.82 × 11,579.31
  4. Step 4: Simplify right side
    21,010.74x = 335,740,009.17
  5. Step 5: Solve for x
    x = 335,740,009.17/21,010.74
  6. Step 6: Final answer
    x = 15,979.45

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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.