Home / 20,640.86-28,493.10-13,935.56

Finding the Fourth Proportional to 20,640.86, 28,493.10 and 13,935.56

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Solution

The fourth proportional to 20,640.86, 28,493.10 and 13,935.56 is: 19,236.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.86 : 28,493.10 = 13,935.56 : x
  2. Step 2: Convert to fraction form
    20,640.86/28,493.10 = 13,935.56/x
  3. Step 3: Cross multiply
    20,640.86x = 28,493.10 × 13,935.56
  4. Step 4: Simplify right side
    20,640.86x = 397,067,304.64
  5. Step 5: Solve for x
    x = 397,067,304.64/20,640.86
  6. Step 6: Final answer
    x = 19,236.96

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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.