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Finding the Fourth Proportional to 18,904.56, 28,360.96 and 7,221.12

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Solution

The fourth proportional to 18,904.56, 28,360.96 and 7,221.12 is: 10,833.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,904.56 : 28,360.96 = 7,221.12 : x
  2. Step 2: Convert to fraction form
    18,904.56/28,360.96 = 7,221.12/x
  3. Step 3: Cross multiply
    18,904.56x = 28,360.96 × 7,221.12
  4. Step 4: Simplify right side
    18,904.56x = 204,797,895.48
  5. Step 5: Solve for x
    x = 204,797,895.48/18,904.56
  6. Step 6: Final answer
    x = 10,833.25

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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.