Home / 20,377.42-28,121.88-11,425.84

Finding the Fourth Proportional to 20,377.42, 28,121.88 and 11,425.84

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Solution

The fourth proportional to 20,377.42, 28,121.88 and 11,425.84 is: 15,768.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,377.42 : 28,121.88 = 11,425.84 : x
  2. Step 2: Convert to fraction form
    20,377.42/28,121.88 = 11,425.84/x
  3. Step 3: Cross multiply
    20,377.42x = 28,121.88 × 11,425.84
  4. Step 4: Simplify right side
    20,377.42x = 321,316,101.38
  5. Step 5: Solve for x
    x = 321,316,101.38/20,377.42
  6. Step 6: Final answer
    x = 15,768.24

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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.