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Finding the Fourth Proportional to 9,091.90, 13,620.48 and 7,620.54

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Solution

The fourth proportional to 9,091.90, 13,620.48 and 7,620.54 is: 11,416.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,091.90 : 13,620.48 = 7,620.54 : x
  2. Step 2: Convert to fraction form
    9,091.90/13,620.48 = 7,620.54/x
  3. Step 3: Cross multiply
    9,091.90x = 13,620.48 × 7,620.54
  4. Step 4: Simplify right side
    9,091.90x = 103,795,412.66
  5. Step 5: Solve for x
    x = 103,795,412.66/9,091.90
  6. Step 6: Final answer
    x = 11,416.25

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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.