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Finding the Fourth Proportional to 13,868.25, 20,807.61 and 8,325.46

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Solution

The fourth proportional to 13,868.25, 20,807.61 and 8,325.46 is: 12,491.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,868.25 : 20,807.61 = 8,325.46 : x
  2. Step 2: Convert to fraction form
    13,868.25/20,807.61 = 8,325.46/x
  3. Step 3: Cross multiply
    13,868.25x = 20,807.61 × 8,325.46
  4. Step 4: Simplify right side
    13,868.25x = 173,232,872.73
  5. Step 5: Solve for x
    x = 173,232,872.73/13,868.25
  6. Step 6: Final answer
    x = 12,491.33

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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.