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Finding the Fourth Proportional to 8,694.79, 11,997.71 and 5,157.31

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Solution

The fourth proportional to 8,694.79, 11,997.71 and 5,157.31 is: 7,116.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,694.79 : 11,997.71 = 5,157.31 : x
  2. Step 2: Convert to fraction form
    8,694.79/11,997.71 = 5,157.31/x
  3. Step 3: Cross multiply
    8,694.79x = 11,997.71 × 5,157.31
  4. Step 4: Simplify right side
    8,694.79x = 61,875,909.76
  5. Step 5: Solve for x
    x = 61,875,909.76/8,694.79
  6. Step 6: Final answer
    x = 7,116.44

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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.