Home / 20,443.28-30,664.53-11,142.49

Finding the Fourth Proportional to 20,443.28, 30,664.53 and 11,142.49

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Solution

The fourth proportional to 20,443.28, 30,664.53 and 11,142.49 is: 16,713.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,443.28 : 30,664.53 = 11,142.49 : x
  2. Step 2: Convert to fraction form
    20,443.28/30,664.53 = 11,142.49/x
  3. Step 3: Cross multiply
    20,443.28x = 30,664.53 × 11,142.49
  4. Step 4: Simplify right side
    20,443.28x = 341,679,218.88
  5. Step 5: Solve for x
    x = 341,679,218.88/20,443.28
  6. Step 6: Final answer
    x = 16,713.52

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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.