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Finding the Fourth Proportional to 18,720.95, 28,073.22 and 7,025.97

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Solution

The fourth proportional to 18,720.95, 28,073.22 and 7,025.97 is: 10,535.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.95 : 28,073.22 = 7,025.97 : x
  2. Step 2: Convert to fraction form
    18,720.95/28,073.22 = 7,025.97/x
  3. Step 3: Cross multiply
    18,720.95x = 28,073.22 × 7,025.97
  4. Step 4: Simplify right side
    18,720.95x = 197,241,601.52
  5. Step 5: Solve for x
    x = 197,241,601.52/18,720.95
  6. Step 6: Final answer
    x = 10,535.88

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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.