Home / 21,009.19-28,991.37-11,577.82

Finding the Fourth Proportional to 21,009.19, 28,991.37 and 11,577.82

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Solution

The fourth proportional to 21,009.19, 28,991.37 and 11,577.82 is: 15,976.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.19 : 28,991.37 = 11,577.82 : x
  2. Step 2: Convert to fraction form
    21,009.19/28,991.37 = 11,577.82/x
  3. Step 3: Cross multiply
    21,009.19x = 28,991.37 × 11,577.82
  4. Step 4: Simplify right side
    21,009.19x = 335,656,863.41
  5. Step 5: Solve for x
    x = 335,656,863.41/21,009.19
  6. Step 6: Final answer
    x = 15,976.67

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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.