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Finding the Fourth Proportional to 12,745.40, 19,118.08 and 8,361.82

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Solution

The fourth proportional to 12,745.40, 19,118.08 and 8,361.82 is: 12,542.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,745.40 : 19,118.08 = 8,361.82 : x
  2. Step 2: Convert to fraction form
    12,745.40/19,118.08 = 8,361.82/x
  3. Step 3: Cross multiply
    12,745.40x = 19,118.08 × 8,361.82
  4. Step 4: Simplify right side
    12,745.40x = 159,861,943.71
  5. Step 5: Solve for x
    x = 159,861,943.71/12,745.40
  6. Step 6: Final answer
    x = 12,542.72

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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.