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Finding the Fourth Proportional to 11,887.42, 16,405.86 and 6,851.86

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Solution

The fourth proportional to 11,887.42, 16,405.86 and 6,851.86 is: 9,456.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,887.42 : 16,405.86 = 6,851.86 : x
  2. Step 2: Convert to fraction form
    11,887.42/16,405.86 = 6,851.86/x
  3. Step 3: Cross multiply
    11,887.42x = 16,405.86 × 6,851.86
  4. Step 4: Simplify right side
    11,887.42x = 112,410,655.90
  5. Step 5: Solve for x
    x = 112,410,655.90/11,887.42
  6. Step 6: Final answer
    x = 9,456.27

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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.