Home / 20,945.81-28,905.22-11,996.28

Finding the Fourth Proportional to 20,945.81, 28,905.22 and 11,996.28

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Solution

The fourth proportional to 20,945.81, 28,905.22 and 11,996.28 is: 16,554.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.81 : 28,905.22 = 11,996.28 : x
  2. Step 2: Convert to fraction form
    20,945.81/28,905.22 = 11,996.28/x
  3. Step 3: Cross multiply
    20,945.81x = 28,905.22 × 11,996.28
  4. Step 4: Simplify right side
    20,945.81x = 346,755,127.58
  5. Step 5: Solve for x
    x = 346,755,127.58/20,945.81
  6. Step 6: Final answer
    x = 16,554.87

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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.