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Finding the Fourth Proportional to 9,990.93, 14,982.03 and 5,309.81

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Solution

The fourth proportional to 9,990.93, 14,982.03 and 5,309.81 is: 7,962.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.93 : 14,982.03 = 5,309.81 : x
  2. Step 2: Convert to fraction form
    9,990.93/14,982.03 = 5,309.81/x
  3. Step 3: Cross multiply
    9,990.93x = 14,982.03 × 5,309.81
  4. Step 4: Simplify right side
    9,990.93x = 79,551,732.71
  5. Step 5: Solve for x
    x = 79,551,732.71/9,990.93
  6. Step 6: Final answer
    x = 7,962.40

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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.