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Finding the Fourth Proportional to 5,293.15, 7,939.11 and 1,397.86

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Solution

The fourth proportional to 5,293.15, 7,939.11 and 1,397.86 is: 2,096.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,293.15 : 7,939.11 = 1,397.86 : x
  2. Step 2: Convert to fraction form
    5,293.15/7,939.11 = 1,397.86/x
  3. Step 3: Cross multiply
    5,293.15x = 7,939.11 × 1,397.86
  4. Step 4: Simplify right side
    5,293.15x = 11,097,749.70
  5. Step 5: Solve for x
    x = 11,097,749.70/5,293.15
  6. Step 6: Final answer
    x = 2,096.63

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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.