Home / 10,918.67-16,378.86-3,900.20

Finding the Fourth Proportional to 10,918.67, 16,378.86 and 3,900.20

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Solution

The fourth proportional to 10,918.67, 16,378.86 and 3,900.20 is: 5,850.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,918.67 : 16,378.86 = 3,900.20 : x
  2. Step 2: Convert to fraction form
    10,918.67/16,378.86 = 3,900.20/x
  3. Step 3: Cross multiply
    10,918.67x = 16,378.86 × 3,900.20
  4. Step 4: Simplify right side
    10,918.67x = 63,880,829.77
  5. Step 5: Solve for x
    x = 63,880,829.77/10,918.67
  6. Step 6: Final answer
    x = 5,850.61

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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.