Home / 18,920.55-28,383.53-6,438.45

Finding the Fourth Proportional to 18,920.55, 28,383.53 and 6,438.45

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Solution

The fourth proportional to 18,920.55, 28,383.53 and 6,438.45 is: 9,658.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,920.55 : 28,383.53 = 6,438.45 : x
  2. Step 2: Convert to fraction form
    18,920.55/28,383.53 = 6,438.45/x
  3. Step 3: Cross multiply
    18,920.55x = 28,383.53 × 6,438.45
  4. Step 4: Simplify right side
    18,920.55x = 182,745,906.54
  5. Step 5: Solve for x
    x = 182,745,906.54/18,920.55
  6. Step 6: Final answer
    x = 9,658.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.