Home / 8,431.16-12,647.48-2,191.14

Finding the Fourth Proportional to 8,431.16, 12,647.48 and 2,191.14

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Solution

The fourth proportional to 8,431.16, 12,647.48 and 2,191.14 is: 3,286.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,431.16 : 12,647.48 = 2,191.14 : x
  2. Step 2: Convert to fraction form
    8,431.16/12,647.48 = 2,191.14/x
  3. Step 3: Cross multiply
    8,431.16x = 12,647.48 × 2,191.14
  4. Step 4: Simplify right side
    8,431.16x = 27,712,388.37
  5. Step 5: Solve for x
    x = 27,712,388.37/8,431.16
  6. Step 6: Final answer
    x = 3,286.90

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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.