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Finding the Fourth Proportional to 13,361.60, 18,516.86 and 13,173.68

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Solution

The fourth proportional to 13,361.60, 18,516.86 and 13,173.68 is: 18,256.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,361.60 : 18,516.86 = 13,173.68 : x
  2. Step 2: Convert to fraction form
    13,361.60/18,516.86 = 13,173.68/x
  3. Step 3: Cross multiply
    13,361.60x = 18,516.86 × 13,173.68
  4. Step 4: Simplify right side
    13,361.60x = 243,935,188.24
  5. Step 5: Solve for x
    x = 243,935,188.24/13,361.60
  6. Step 6: Final answer
    x = 18,256.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.