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Finding the Fourth Proportional to 7,810.61, 11,717.03 and 2,879.87

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Solution

The fourth proportional to 7,810.61, 11,717.03 and 2,879.87 is: 4,320.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,810.61 : 11,717.03 = 2,879.87 : x
  2. Step 2: Convert to fraction form
    7,810.61/11,717.03 = 2,879.87/x
  3. Step 3: Cross multiply
    7,810.61x = 11,717.03 × 2,879.87
  4. Step 4: Simplify right side
    7,810.61x = 33,743,476.13
  5. Step 5: Solve for x
    x = 33,743,476.13/7,810.61
  6. Step 6: Final answer
    x = 4,320.21

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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.