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Finding the Fourth Proportional to 9,988.70, 14,983.88 and 2,872.97

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Solution

The fourth proportional to 9,988.70, 14,983.88 and 2,872.97 is: 4,309.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,988.70 : 14,983.88 = 2,872.97 : x
  2. Step 2: Convert to fraction form
    9,988.70/14,983.88 = 2,872.97/x
  3. Step 3: Cross multiply
    9,988.70x = 14,983.88 × 2,872.97
  4. Step 4: Simplify right side
    9,988.70x = 43,048,148.44
  5. Step 5: Solve for x
    x = 43,048,148.44/9,988.70
  6. Step 6: Final answer
    x = 4,309.69

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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.