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Finding the Fourth Proportional to 8,694.63, 11,989.08 and 6,460.65

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Solution

The fourth proportional to 8,694.63, 11,989.08 and 6,460.65 is: 8,908.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,694.63 : 11,989.08 = 6,460.65 : x
  2. Step 2: Convert to fraction form
    8,694.63/11,989.08 = 6,460.65/x
  3. Step 3: Cross multiply
    8,694.63x = 11,989.08 × 6,460.65
  4. Step 4: Simplify right side
    8,694.63x = 77,457,249.70
  5. Step 5: Solve for x
    x = 77,457,249.70/8,694.63
  6. Step 6: Final answer
    x = 8,908.63

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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.