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Finding the Fourth Proportional to 9,990.74, 14,993.62 and 3,756.90

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Solution

The fourth proportional to 9,990.74, 14,993.62 and 3,756.90 is: 5,638.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.74 : 14,993.62 = 3,756.90 : x
  2. Step 2: Convert to fraction form
    9,990.74/14,993.62 = 3,756.90/x
  3. Step 3: Cross multiply
    9,990.74x = 14,993.62 × 3,756.90
  4. Step 4: Simplify right side
    9,990.74x = 56,329,530.98
  5. Step 5: Solve for x
    x = 56,329,530.98/9,990.74
  6. Step 6: Final answer
    x = 5,638.17

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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.