Home / 20,936.76-28,894.50-11,507.28

Finding the Fourth Proportional to 20,936.76, 28,894.50 and 11,507.28

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Solution

The fourth proportional to 20,936.76, 28,894.50 and 11,507.28 is: 15,881.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.76 : 28,894.50 = 11,507.28 : x
  2. Step 2: Convert to fraction form
    20,936.76/28,894.50 = 11,507.28/x
  3. Step 3: Cross multiply
    20,936.76x = 28,894.50 × 11,507.28
  4. Step 4: Simplify right side
    20,936.76x = 332,497,101.96
  5. Step 5: Solve for x
    x = 332,497,101.96/20,936.76
  6. Step 6: Final answer
    x = 15,881.02

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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.