Home / 10,913.79-16,365-3,891.09

Finding the Fourth Proportional to 10,913.79, 16,365 and 3,891.09

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Solution

The fourth proportional to 10,913.79, 16,365 and 3,891.09 is: 5,834.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,913.79 : 16,365 = 3,891.09 : x
  2. Step 2: Convert to fraction form
    10,913.79/16,365 = 3,891.09/x
  3. Step 3: Cross multiply
    10,913.79x = 16,365 × 3,891.09
  4. Step 4: Simplify right side
    10,913.79x = 63,677,687.85
  5. Step 5: Solve for x
    x = 63,677,687.85/10,913.79
  6. Step 6: Final answer
    x = 5,834.61

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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.