Home / 10,781.67-16,172.70-2,990.49

Finding the Fourth Proportional to 10,781.67, 16,172.70 and 2,990.49

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Solution

The fourth proportional to 10,781.67, 16,172.70 and 2,990.49 is: 4,485.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,781.67 : 16,172.70 = 2,990.49 : x
  2. Step 2: Convert to fraction form
    10,781.67/16,172.70 = 2,990.49/x
  3. Step 3: Cross multiply
    10,781.67x = 16,172.70 × 2,990.49
  4. Step 4: Simplify right side
    10,781.67x = 48,364,297.62
  5. Step 5: Solve for x
    x = 48,364,297.62/10,781.67
  6. Step 6: Final answer
    x = 4,485.79

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1.5x scale

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.