Home / 20,935.54-28,890.96-11,983

Finding the Fourth Proportional to 20,935.54, 28,890.96 and 11,983

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Solution

The fourth proportional to 20,935.54, 28,890.96 and 11,983 is: 16,536.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,935.54 : 28,890.96 = 11,983 : x
  2. Step 2: Convert to fraction form
    20,935.54/28,890.96 = 11,983/x
  3. Step 3: Cross multiply
    20,935.54x = 28,890.96 × 11,983
  4. Step 4: Simplify right side
    20,935.54x = 346,200,373.68
  5. Step 5: Solve for x
    x = 346,200,373.68/20,935.54
  6. Step 6: Final answer
    x = 16,536.49

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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.