Home / 8,142.36-12,214.06-3,147.12

Finding the Fourth Proportional to 8,142.36, 12,214.06 and 3,147.12

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Solution

The fourth proportional to 8,142.36, 12,214.06 and 3,147.12 is: 4,720.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,142.36 : 12,214.06 = 3,147.12 : x
  2. Step 2: Convert to fraction form
    8,142.36/12,214.06 = 3,147.12/x
  3. Step 3: Cross multiply
    8,142.36x = 12,214.06 × 3,147.12
  4. Step 4: Simplify right side
    8,142.36x = 38,439,112.51
  5. Step 5: Solve for x
    x = 38,439,112.51/8,142.36
  6. Step 6: Final answer
    x = 4,720.88

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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.