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Finding the Fourth Proportional to 7,132.78, 10,699.71 and 1,939.06

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Solution

The fourth proportional to 7,132.78, 10,699.71 and 1,939.06 is: 2,908.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,132.78 : 10,699.71 = 1,939.06 : x
  2. Step 2: Convert to fraction form
    7,132.78/10,699.71 = 1,939.06/x
  3. Step 3: Cross multiply
    7,132.78x = 10,699.71 × 1,939.06
  4. Step 4: Simplify right side
    7,132.78x = 20,747,379.67
  5. Step 5: Solve for x
    x = 20,747,379.67/7,132.78
  6. Step 6: Final answer
    x = 2,908.74

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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.