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Finding the Fourth Proportional to 9,138.81, 13,674.54 and 8,090.49

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Solution

The fourth proportional to 9,138.81, 13,674.54 and 8,090.49 is: 12,105.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,138.81 : 13,674.54 = 8,090.49 : x
  2. Step 2: Convert to fraction form
    9,138.81/13,674.54 = 8,090.49/x
  3. Step 3: Cross multiply
    9,138.81x = 13,674.54 × 8,090.49
  4. Step 4: Simplify right side
    9,138.81x = 110,633,729.12
  5. Step 5: Solve for x
    x = 110,633,729.12/9,138.81
  6. Step 6: Final answer
    x = 12,105.92

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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.