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Finding the Fourth Proportional to 9,988.75, 14,990.61 and 3,754.90

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Solution

The fourth proportional to 9,988.75, 14,990.61 and 3,754.90 is: 5,635.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,988.75 : 14,990.61 = 3,754.90 : x
  2. Step 2: Convert to fraction form
    9,988.75/14,990.61 = 3,754.90/x
  3. Step 3: Cross multiply
    9,988.75x = 14,990.61 × 3,754.90
  4. Step 4: Simplify right side
    9,988.75x = 56,288,166.54
  5. Step 5: Solve for x
    x = 56,288,166.54/9,988.75
  6. Step 6: Final answer
    x = 5,635.16

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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.