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Finding the Fourth Proportional to 9,090.21, 13,620.64 and 7,632.21

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Solution

The fourth proportional to 9,090.21, 13,620.64 and 7,632.21 is: 11,435.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,090.21 : 13,620.64 = 7,632.21 : x
  2. Step 2: Convert to fraction form
    9,090.21/13,620.64 = 7,632.21/x
  3. Step 3: Cross multiply
    9,090.21x = 13,620.64 × 7,632.21
  4. Step 4: Simplify right side
    9,090.21x = 103,955,584.81
  5. Step 5: Solve for x
    x = 103,955,584.81/9,090.21
  6. Step 6: Final answer
    x = 11,435.99

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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.