Home / 21,528.75-29,708.85-11,969.22

Finding the Fourth Proportional to 21,528.75, 29,708.85 and 11,969.22

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Solution

The fourth proportional to 21,528.75, 29,708.85 and 11,969.22 is: 16,517.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,528.75 : 29,708.85 = 11,969.22 : x
  2. Step 2: Convert to fraction form
    21,528.75/29,708.85 = 11,969.22/x
  3. Step 3: Cross multiply
    21,528.75x = 29,708.85 × 11,969.22
  4. Step 4: Simplify right side
    21,528.75x = 355,591,761.60
  5. Step 5: Solve for x
    x = 355,591,761.60/21,528.75
  6. Step 6: Final answer
    x = 16,517.06

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1.5x scale

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.