Home / 21,228.75-31,838.13-8,736.39

Finding the Fourth Proportional to 21,228.75, 31,838.13 and 8,736.39

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Solution

The fourth proportional to 21,228.75, 31,838.13 and 8,736.39 is: 13,102.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,228.75 : 31,838.13 = 8,736.39 : x
  2. Step 2: Convert to fraction form
    21,228.75/31,838.13 = 8,736.39/x
  3. Step 3: Cross multiply
    21,228.75x = 31,838.13 × 8,736.39
  4. Step 4: Simplify right side
    21,228.75x = 278,150,320.55
  5. Step 5: Solve for x
    x = 278,150,320.55/21,228.75
  6. Step 6: Final answer
    x = 13,102.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.