Home / 20,856.43-31,262.88-10,319.87

Finding the Fourth Proportional to 20,856.43, 31,262.88 and 10,319.87

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Solution

The fourth proportional to 20,856.43, 31,262.88 and 10,319.87 is: 15,469.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.43 : 31,262.88 = 10,319.87 : x
  2. Step 2: Convert to fraction form
    20,856.43/31,262.88 = 10,319.87/x
  3. Step 3: Cross multiply
    20,856.43x = 31,262.88 × 10,319.87
  4. Step 4: Simplify right side
    20,856.43x = 322,628,935.58
  5. Step 5: Solve for x
    x = 322,628,935.58/20,856.43
  6. Step 6: Final answer
    x = 15,469.04

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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.