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Finding the Fourth Proportional to 7,918.61, 11,879.69 and 2,988.27

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Solution

The fourth proportional to 7,918.61, 11,879.69 and 2,988.27 is: 4,483.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,918.61 : 11,879.69 = 2,988.27 : x
  2. Step 2: Convert to fraction form
    7,918.61/11,879.69 = 2,988.27/x
  3. Step 3: Cross multiply
    7,918.61x = 11,879.69 × 2,988.27
  4. Step 4: Simplify right side
    7,918.61x = 35,499,706.29
  5. Step 5: Solve for x
    x = 35,499,706.29/7,918.61
  6. Step 6: Final answer
    x = 4,483.08

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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.