Home / 20,963.24-28,928.69-11,531.82

Finding the Fourth Proportional to 20,963.24, 28,928.69 and 11,531.82

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Solution

The fourth proportional to 20,963.24, 28,928.69 and 11,531.82 is: 15,913.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.24 : 28,928.69 = 11,531.82 : x
  2. Step 2: Convert to fraction form
    20,963.24/28,928.69 = 11,531.82/x
  3. Step 3: Cross multiply
    20,963.24x = 28,928.69 × 11,531.82
  4. Step 4: Simplify right side
    20,963.24x = 333,600,445.92
  5. Step 5: Solve for x
    x = 333,600,445.92/20,963.24
  6. Step 6: Final answer
    x = 15,913.59

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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.