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Finding the Fourth Proportional to 18,713.72, 28,057.44 and 7,617.08

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Solution

The fourth proportional to 18,713.72, 28,057.44 and 7,617.08 is: 11,420.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,713.72 : 28,057.44 = 7,617.08 : x
  2. Step 2: Convert to fraction form
    18,713.72/28,057.44 = 7,617.08/x
  3. Step 3: Cross multiply
    18,713.72x = 28,057.44 × 7,617.08
  4. Step 4: Simplify right side
    18,713.72x = 213,715,765.08
  5. Step 5: Solve for x
    x = 213,715,765.08/18,713.72
  6. Step 6: Final answer
    x = 11,420.27

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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.