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Finding the Fourth Proportional to 18,501.81, 27,745.41 and 7,406.43

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Solution

The fourth proportional to 18,501.81, 27,745.41 and 7,406.43 is: 11,106.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,501.81 : 27,745.41 = 7,406.43 : x
  2. Step 2: Convert to fraction form
    18,501.81/27,745.41 = 7,406.43/x
  3. Step 3: Cross multiply
    18,501.81x = 27,745.41 × 7,406.43
  4. Step 4: Simplify right side
    18,501.81x = 205,494,436.99
  5. Step 5: Solve for x
    x = 205,494,436.99/18,501.81
  6. Step 6: Final answer
    x = 11,106.72

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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.