Home / 18,720.39-28,072.82-7,619.54

Finding the Fourth Proportional to 18,720.39, 28,072.82 and 7,619.54

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Solution

The fourth proportional to 18,720.39, 28,072.82 and 7,619.54 is: 11,426.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.39 : 28,072.82 = 7,619.54 : x
  2. Step 2: Convert to fraction form
    18,720.39/28,072.82 = 7,619.54/x
  3. Step 3: Cross multiply
    18,720.39x = 28,072.82 × 7,619.54
  4. Step 4: Simplify right side
    18,720.39x = 213,902,064.13
  5. Step 5: Solve for x
    x = 213,902,064.13/18,720.39
  6. Step 6: Final answer
    x = 11,426.15

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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.