Home / 20,961.44-28,949.28-13,022.48

Finding the Fourth Proportional to 20,961.44, 28,949.28 and 13,022.48

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Solution

The fourth proportional to 20,961.44, 28,949.28 and 13,022.48 is: 17,985.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.44 : 28,949.28 = 13,022.48 : x
  2. Step 2: Convert to fraction form
    20,961.44/28,949.28 = 13,022.48/x
  3. Step 3: Cross multiply
    20,961.44x = 28,949.28 × 13,022.48
  4. Step 4: Simplify right side
    20,961.44x = 376,991,419.81
  5. Step 5: Solve for x
    x = 376,991,419.81/20,961.44
  6. Step 6: Final answer
    x = 17,985.00

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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.