Home / 20,892.11-28,832.67-11,939.45

Finding the Fourth Proportional to 20,892.11, 28,832.67 and 11,939.45

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Solution

The fourth proportional to 20,892.11, 28,832.67 and 11,939.45 is: 16,477.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,892.11 : 28,832.67 = 11,939.45 : x
  2. Step 2: Convert to fraction form
    20,892.11/28,832.67 = 11,939.45/x
  3. Step 3: Cross multiply
    20,892.11x = 28,832.67 × 11,939.45
  4. Step 4: Simplify right side
    20,892.11x = 344,246,077.67
  5. Step 5: Solve for x
    x = 344,246,077.67/20,892.11
  6. Step 6: Final answer
    x = 16,477.33

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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.