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Finding the Fourth Proportional to 16,745.40, 25,110.81 and 8,420.22

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Solution

The fourth proportional to 16,745.40, 25,110.81 and 8,420.22 is: 12,626.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,745.40 : 25,110.81 = 8,420.22 : x
  2. Step 2: Convert to fraction form
    16,745.40/25,110.81 = 8,420.22/x
  3. Step 3: Cross multiply
    16,745.40x = 25,110.81 × 8,420.22
  4. Step 4: Simplify right side
    16,745.40x = 211,438,544.58
  5. Step 5: Solve for x
    x = 211,438,544.58/16,745.40
  6. Step 6: Final answer
    x = 12,626.66

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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.