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Finding the Fourth Proportional to 11,407.12, 15,739.92 and 6,371.12

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Solution

The fourth proportional to 11,407.12, 15,739.92 and 6,371.12 is: 8,791.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,407.12 : 15,739.92 = 6,371.12 : x
  2. Step 2: Convert to fraction form
    11,407.12/15,739.92 = 6,371.12/x
  3. Step 3: Cross multiply
    11,407.12x = 15,739.92 × 6,371.12
  4. Step 4: Simplify right side
    11,407.12x = 100,280,919.11
  5. Step 5: Solve for x
    x = 100,280,919.11/11,407.12
  6. Step 6: Final answer
    x = 8,791.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.