Home / 20,963.19-28,928.61-11,531.75

Finding the Fourth Proportional to 20,963.19, 28,928.61 and 11,531.75

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Solution

The fourth proportional to 20,963.19, 28,928.61 and 11,531.75 is: 15,913.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.19 : 28,928.61 = 11,531.75 : x
  2. Step 2: Convert to fraction form
    20,963.19/28,928.61 = 11,531.75/x
  3. Step 3: Cross multiply
    20,963.19x = 28,928.61 × 11,531.75
  4. Step 4: Simplify right side
    20,963.19x = 333,597,570.69
  5. Step 5: Solve for x
    x = 333,597,570.69/20,963.19
  6. Step 6: Final answer
    x = 15,913.49

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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.