Home / 21,009.26-28,992.78-11,577.83

Finding the Fourth Proportional to 21,009.26, 28,992.78 and 11,577.83

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Solution

The fourth proportional to 21,009.26, 28,992.78 and 11,577.83 is: 15,977.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.26 : 28,992.78 = 11,577.83 : x
  2. Step 2: Convert to fraction form
    21,009.26/28,992.78 = 11,577.83/x
  3. Step 3: Cross multiply
    21,009.26x = 28,992.78 × 11,577.83
  4. Step 4: Simplify right side
    21,009.26x = 335,673,333.10
  5. Step 5: Solve for x
    x = 335,673,333.10/21,009.26
  6. Step 6: Final answer
    x = 15,977.40

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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.