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Finding the Fourth Proportional to 18,138.74, 27,218.62 and 7,607.82

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Solution

The fourth proportional to 18,138.74, 27,218.62 and 7,607.82 is: 11,416.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.74 : 27,218.62 = 7,607.82 : x
  2. Step 2: Convert to fraction form
    18,138.74/27,218.62 = 7,607.82/x
  3. Step 3: Cross multiply
    18,138.74x = 27,218.62 × 7,607.82
  4. Step 4: Simplify right side
    18,138.74x = 207,074,462.49
  5. Step 5: Solve for x
    x = 207,074,462.49/18,138.74
  6. Step 6: Final answer
    x = 11,416.14

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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.