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Finding the Fourth Proportional to 13,704.22, 18,900.39 and 8,397.10

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Solution

The fourth proportional to 13,704.22, 18,900.39 and 8,397.10 is: 11,580.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,704.22 : 18,900.39 = 8,397.10 : x
  2. Step 2: Convert to fraction form
    13,704.22/18,900.39 = 8,397.10/x
  3. Step 3: Cross multiply
    13,704.22x = 18,900.39 × 8,397.10
  4. Step 4: Simplify right side
    13,704.22x = 158,708,464.87
  5. Step 5: Solve for x
    x = 158,708,464.87/13,704.22
  6. Step 6: Final answer
    x = 11,580.99

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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.