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Finding the Fourth Proportional to 10,863.86, 14,991.39 and 6,147.86

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Solution

The fourth proportional to 10,863.86, 14,991.39 and 6,147.86 is: 8,483.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,863.86 : 14,991.39 = 6,147.86 : x
  2. Step 2: Convert to fraction form
    10,863.86/14,991.39 = 6,147.86/x
  3. Step 3: Cross multiply
    10,863.86x = 14,991.39 × 6,147.86
  4. Step 4: Simplify right side
    10,863.86x = 92,164,891.97
  5. Step 5: Solve for x
    x = 92,164,891.97/10,863.86
  6. Step 6: Final answer
    x = 8,483.63

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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.