Home / 10,781.88-16,172.81-2,990.69

Finding the Fourth Proportional to 10,781.88, 16,172.81 and 2,990.69

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Solution

The fourth proportional to 10,781.88, 16,172.81 and 2,990.69 is: 4,486.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,781.88 : 16,172.81 = 2,990.69 : x
  2. Step 2: Convert to fraction form
    10,781.88/16,172.81 = 2,990.69/x
  3. Step 3: Cross multiply
    10,781.88x = 16,172.81 × 2,990.69
  4. Step 4: Simplify right side
    10,781.88x = 48,367,861.14
  5. Step 5: Solve for x
    x = 48,367,861.14/10,781.88
  6. Step 6: Final answer
    x = 4,486.03

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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.