Home / 20,928.24-31,397-6,887.72

Finding the Fourth Proportional to 20,928.24, 31,397 and 6,887.72

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Solution

The fourth proportional to 20,928.24, 31,397 and 6,887.72 is: 10,333.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.24 : 31,397 = 6,887.72 : x
  2. Step 2: Convert to fraction form
    20,928.24/31,397 = 6,887.72/x
  3. Step 3: Cross multiply
    20,928.24x = 31,397 × 6,887.72
  4. Step 4: Simplify right side
    20,928.24x = 216,253,744.84
  5. Step 5: Solve for x
    x = 216,253,744.84/20,928.24
  6. Step 6: Final answer
    x = 10,333.11

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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.