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Finding the Fourth Proportional to 12,167.74, 18,249.99 and 7,739.07

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Solution

The fourth proportional to 12,167.74, 18,249.99 and 7,739.07 is: 11,607.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,167.74 : 18,249.99 = 7,739.07 : x
  2. Step 2: Convert to fraction form
    12,167.74/18,249.99 = 7,739.07/x
  3. Step 3: Cross multiply
    12,167.74x = 18,249.99 × 7,739.07
  4. Step 4: Simplify right side
    12,167.74x = 141,237,950.11
  5. Step 5: Solve for x
    x = 141,237,950.11/12,167.74
  6. Step 6: Final answer
    x = 11,607.57

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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.