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Finding the Fourth Proportional to 13,913.18, 20,745.66 and 12,367.70

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Solution

The fourth proportional to 13,913.18, 20,745.66 and 12,367.70 is: 18,441.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,913.18 : 20,745.66 = 12,367.70 : x
  2. Step 2: Convert to fraction form
    13,913.18/20,745.66 = 12,367.70/x
  3. Step 3: Cross multiply
    13,913.18x = 20,745.66 × 12,367.70
  4. Step 4: Simplify right side
    13,913.18x = 256,576,099.18
  5. Step 5: Solve for x
    x = 256,576,099.18/13,913.18
  6. Step 6: Final answer
    x = 18,441.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.