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Finding the Fourth Proportional to 6,638.86, 9,953.63 and 2,939.09

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Solution

The fourth proportional to 6,638.86, 9,953.63 and 2,939.09 is: 4,406.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,638.86 : 9,953.63 = 2,939.09 : x
  2. Step 2: Convert to fraction form
    6,638.86/9,953.63 = 2,939.09/x
  3. Step 3: Cross multiply
    6,638.86x = 9,953.63 × 2,939.09
  4. Step 4: Simplify right side
    6,638.86x = 29,254,577.49
  5. Step 5: Solve for x
    x = 29,254,577.49/6,638.86
  6. Step 6: Final answer
    x = 4,406.57

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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.