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Finding the Fourth Proportional to 8,704.97, 12,013.31 and 5,120.11

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Solution

The fourth proportional to 8,704.97, 12,013.31 and 5,120.11 is: 7,066.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,704.97 : 12,013.31 = 5,120.11 : x
  2. Step 2: Convert to fraction form
    8,704.97/12,013.31 = 5,120.11/x
  3. Step 3: Cross multiply
    8,704.97x = 12,013.31 × 5,120.11
  4. Step 4: Simplify right side
    8,704.97x = 61,509,496.48
  5. Step 5: Solve for x
    x = 61,509,496.48/8,704.97
  6. Step 6: Final answer
    x = 7,066.02

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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.