Home / 20,765.36-31,152.96-8,286.08

Finding the Fourth Proportional to 20,765.36, 31,152.96 and 8,286.08

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Solution

The fourth proportional to 20,765.36, 31,152.96 and 8,286.08 is: 12,431.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.36 : 31,152.96 = 8,286.08 : x
  2. Step 2: Convert to fraction form
    20,765.36/31,152.96 = 8,286.08/x
  3. Step 3: Cross multiply
    20,765.36x = 31,152.96 × 8,286.08
  4. Step 4: Simplify right side
    20,765.36x = 258,135,918.80
  5. Step 5: Solve for x
    x = 258,135,918.80/20,765.36
  6. Step 6: Final answer
    x = 12,431.08

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1.5x scale

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.