Home / 21,009.47-28,993.01-11,578.03

Finding the Fourth Proportional to 21,009.47, 28,993.01 and 11,578.03

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Solution

The fourth proportional to 21,009.47, 28,993.01 and 11,578.03 is: 15,977.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.47 : 28,993.01 = 11,578.03 : x
  2. Step 2: Convert to fraction form
    21,009.47/28,993.01 = 11,578.03/x
  3. Step 3: Cross multiply
    21,009.47x = 28,993.01 × 11,578.03
  4. Step 4: Simplify right side
    21,009.47x = 335,681,939.57
  5. Step 5: Solve for x
    x = 335,681,939.57/21,009.47
  6. Step 6: Final answer
    x = 15,977.65

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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.