Home / 20,935.76-28,890.86-11,375.42

Finding the Fourth Proportional to 20,935.76, 28,890.86 and 11,375.42

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Solution

The fourth proportional to 20,935.76, 28,890.86 and 11,375.42 is: 15,697.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,935.76 : 28,890.86 = 11,375.42 : x
  2. Step 2: Convert to fraction form
    20,935.76/28,890.86 = 11,375.42/x
  3. Step 3: Cross multiply
    20,935.76x = 28,890.86 × 11,375.42
  4. Step 4: Simplify right side
    20,935.76x = 328,645,465.33
  5. Step 5: Solve for x
    x = 328,645,465.33/20,935.76
  6. Step 6: Final answer
    x = 15,697.81

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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.