Home / 20,856.64-31,286.33-8,375.05

Finding the Fourth Proportional to 20,856.64, 31,286.33 and 8,375.05

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Solution

The fourth proportional to 20,856.64, 31,286.33 and 8,375.05 is: 12,563.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.64 : 31,286.33 = 8,375.05 : x
  2. Step 2: Convert to fraction form
    20,856.64/31,286.33 = 8,375.05/x
  3. Step 3: Cross multiply
    20,856.64x = 31,286.33 × 8,375.05
  4. Step 4: Simplify right side
    20,856.64x = 262,024,477.83
  5. Step 5: Solve for x
    x = 262,024,477.83/20,856.64
  6. Step 6: Final answer
    x = 12,563.12

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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.