Home / 21,343.92-29,455.89-11,913.09

Finding the Fourth Proportional to 21,343.92, 29,455.89 and 11,913.09

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Solution

The fourth proportional to 21,343.92, 29,455.89 and 11,913.09 is: 16,440.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,343.92 : 29,455.89 = 11,913.09 : x
  2. Step 2: Convert to fraction form
    21,343.92/29,455.89 = 11,913.09/x
  3. Step 3: Cross multiply
    21,343.92x = 29,455.89 × 11,913.09
  4. Step 4: Simplify right side
    21,343.92x = 350,910,668.60
  5. Step 5: Solve for x
    x = 350,910,668.60/21,343.92
  6. Step 6: Final answer
    x = 16,440.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.