Home / 20,928.31-28,881.29-11,496.87

Finding the Fourth Proportional to 20,928.31, 28,881.29 and 11,496.87

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Solution

The fourth proportional to 20,928.31, 28,881.29 and 11,496.87 is: 15,865.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.31 : 28,881.29 = 11,496.87 : x
  2. Step 2: Convert to fraction form
    20,928.31/28,881.29 = 11,496.87/x
  3. Step 3: Cross multiply
    20,928.31x = 28,881.29 × 11,496.87
  4. Step 4: Simplify right side
    20,928.31x = 332,044,465.30
  5. Step 5: Solve for x
    x = 332,044,465.30/20,928.31
  6. Step 6: Final answer
    x = 15,865.81

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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.