Home / 21,489.38-29,655.39-11,929.41

Finding the Fourth Proportional to 21,489.38, 29,655.39 and 11,929.41

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Solution

The fourth proportional to 21,489.38, 29,655.39 and 11,929.41 is: 16,462.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,489.38 : 29,655.39 = 11,929.41 : x
  2. Step 2: Convert to fraction form
    21,489.38/29,655.39 = 11,929.41/x
  3. Step 3: Cross multiply
    21,489.38x = 29,655.39 × 11,929.41
  4. Step 4: Simplify right side
    21,489.38x = 353,771,157.74
  5. Step 5: Solve for x
    x = 353,771,157.74/21,489.38
  6. Step 6: Final answer
    x = 16,462.61

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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.