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Finding the Fourth Proportional to 8,974.34, 13,440.64 and 8,662.88

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Solution

The fourth proportional to 8,974.34, 13,440.64 and 8,662.88 is: 12,974.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,974.34 : 13,440.64 = 8,662.88 : x
  2. Step 2: Convert to fraction form
    8,974.34/13,440.64 = 8,662.88/x
  3. Step 3: Cross multiply
    8,974.34x = 13,440.64 × 8,662.88
  4. Step 4: Simplify right side
    8,974.34x = 116,434,651.44
  5. Step 5: Solve for x
    x = 116,434,651.44/8,974.34
  6. Step 6: Final answer
    x = 12,974.17

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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.