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Finding the Fourth Proportional to 12,012.10, 18,018.15 and 3,691.93

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Solution

The fourth proportional to 12,012.10, 18,018.15 and 3,691.93 is: 5,537.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,012.10 : 18,018.15 = 3,691.93 : x
  2. Step 2: Convert to fraction form
    12,012.10/18,018.15 = 3,691.93/x
  3. Step 3: Cross multiply
    12,012.10x = 18,018.15 × 3,691.93
  4. Step 4: Simplify right side
    12,012.10x = 66,521,723.42
  5. Step 5: Solve for x
    x = 66,521,723.42/12,012.10
  6. Step 6: Final answer
    x = 5,537.89

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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.