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Finding the Fourth Proportional to 7,990.90, 11,988.69 and 2,368.72

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Solution

The fourth proportional to 7,990.90, 11,988.69 and 2,368.72 is: 3,553.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,990.90 : 11,988.69 = 2,368.72 : x
  2. Step 2: Convert to fraction form
    7,990.90/11,988.69 = 2,368.72/x
  3. Step 3: Cross multiply
    7,990.90x = 11,988.69 × 2,368.72
  4. Step 4: Simplify right side
    7,990.90x = 28,397,849.78
  5. Step 5: Solve for x
    x = 28,397,849.78/7,990.90
  6. Step 6: Final answer
    x = 3,553.77

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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.