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Finding the Fourth Proportional to 13,438.60, 20,133.60 and 11,494.60

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Solution

The fourth proportional to 13,438.60, 20,133.60 and 11,494.60 is: 17,221.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.60 : 20,133.60 = 11,494.60 : x
  2. Step 2: Convert to fraction form
    13,438.60/20,133.60 = 11,494.60/x
  3. Step 3: Cross multiply
    13,438.60x = 20,133.60 × 11,494.60
  4. Step 4: Simplify right side
    13,438.60x = 231,427,678.56
  5. Step 5: Solve for x
    x = 231,427,678.56/13,438.60
  6. Step 6: Final answer
    x = 17,221.12

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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.