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Finding the Fourth Proportional to 13,580.46, 18,745.02 and 8,865.45

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Solution

The fourth proportional to 13,580.46, 18,745.02 and 8,865.45 is: 12,236.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,580.46 : 18,745.02 = 8,865.45 : x
  2. Step 2: Convert to fraction form
    13,580.46/18,745.02 = 8,865.45/x
  3. Step 3: Cross multiply
    13,580.46x = 18,745.02 × 8,865.45
  4. Step 4: Simplify right side
    13,580.46x = 166,183,037.56
  5. Step 5: Solve for x
    x = 166,183,037.56/13,580.46
  6. Step 6: Final answer
    x = 12,236.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.