Home / 21,306.78-29,404.36-11,875.41

Finding the Fourth Proportional to 21,306.78, 29,404.36 and 11,875.41

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Solution

The fourth proportional to 21,306.78, 29,404.36 and 11,875.41 is: 16,388.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,306.78 : 29,404.36 = 11,875.41 : x
  2. Step 2: Convert to fraction form
    21,306.78/29,404.36 = 11,875.41/x
  3. Step 3: Cross multiply
    21,306.78x = 29,404.36 × 11,875.41
  4. Step 4: Simplify right side
    21,306.78x = 349,188,801.10
  5. Step 5: Solve for x
    x = 349,188,801.10/21,306.78
  6. Step 6: Final answer
    x = 16,388.62

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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.