Home / 10,781.88-16,172.80-2,990.70

Finding the Fourth Proportional to 10,781.88, 16,172.80 and 2,990.70

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Solution

The fourth proportional to 10,781.88, 16,172.80 and 2,990.70 is: 4,486.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,781.88 : 16,172.80 = 2,990.70 : x
  2. Step 2: Convert to fraction form
    10,781.88/16,172.80 = 2,990.70/x
  3. Step 3: Cross multiply
    10,781.88x = 16,172.80 × 2,990.70
  4. Step 4: Simplify right side
    10,781.88x = 48,367,992.96
  5. Step 5: Solve for x
    x = 48,367,992.96/10,781.88
  6. Step 6: Final answer
    x = 4,486.04

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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.