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Finding the Fourth Proportional to 8,704.30, 12,992.74 and 7,479.58

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Solution

The fourth proportional to 8,704.30, 12,992.74 and 7,479.58 is: 11,164.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,704.30 : 12,992.74 = 7,479.58 : x
  2. Step 2: Convert to fraction form
    8,704.30/12,992.74 = 7,479.58/x
  3. Step 3: Cross multiply
    8,704.30x = 12,992.74 × 7,479.58
  4. Step 4: Simplify right side
    8,704.30x = 97,180,238.25
  5. Step 5: Solve for x
    x = 97,180,238.25/8,704.30
  6. Step 6: Final answer
    x = 11,164.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.