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Finding the Fourth Proportional to 18,458.10, 27,687.15 and 8,090.10

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Solution

The fourth proportional to 18,458.10, 27,687.15 and 8,090.10 is: 12,135.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,458.10 : 27,687.15 = 8,090.10 : x
  2. Step 2: Convert to fraction form
    18,458.10/27,687.15 = 8,090.10/x
  3. Step 3: Cross multiply
    18,458.10x = 27,687.15 × 8,090.10
  4. Step 4: Simplify right side
    18,458.10x = 223,991,812.22
  5. Step 5: Solve for x
    x = 223,991,812.22/18,458.10
  6. Step 6: Final answer
    x = 12,135.15

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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.