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Finding the Fourth Proportional to 18,925.54, 28,391.73 and 7,826.20

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Solution

The fourth proportional to 18,925.54, 28,391.73 and 7,826.20 is: 11,740.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,925.54 : 28,391.73 = 7,826.20 : x
  2. Step 2: Convert to fraction form
    18,925.54/28,391.73 = 7,826.20/x
  3. Step 3: Cross multiply
    18,925.54x = 28,391.73 × 7,826.20
  4. Step 4: Simplify right side
    18,925.54x = 222,199,357.33
  5. Step 5: Solve for x
    x = 222,199,357.33/18,925.54
  6. Step 6: Final answer
    x = 11,740.71

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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.