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Finding the Fourth Proportional to 10,090.10, 15,135.15 and 7,786.10

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Solution

The fourth proportional to 10,090.10, 15,135.15 and 7,786.10 is: 11,679.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,090.10 : 15,135.15 = 7,786.10 : x
  2. Step 2: Convert to fraction form
    10,090.10/15,135.15 = 7,786.10/x
  3. Step 3: Cross multiply
    10,090.10x = 15,135.15 × 7,786.10
  4. Step 4: Simplify right side
    10,090.10x = 117,843,791.42
  5. Step 5: Solve for x
    x = 117,843,791.42/10,090.10
  6. Step 6: Final answer
    x = 11,679.15

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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.