Home / 21,119.53-29,142.97-12,619.96

Finding the Fourth Proportional to 21,119.53, 29,142.97 and 12,619.96

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Solution

The fourth proportional to 21,119.53, 29,142.97 and 12,619.96 is: 17,414.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,119.53 : 29,142.97 = 12,619.96 : x
  2. Step 2: Convert to fraction form
    21,119.53/29,142.97 = 12,619.96/x
  3. Step 3: Cross multiply
    21,119.53x = 29,142.97 × 12,619.96
  4. Step 4: Simplify right side
    21,119.53x = 367,783,076.13
  5. Step 5: Solve for x
    x = 367,783,076.13/21,119.53
  6. Step 6: Final answer
    x = 17,414.36

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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.