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Finding the Fourth Proportional to 12,644.64, 17,449.56 and 6,979.23

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Solution

The fourth proportional to 12,644.64, 17,449.56 and 6,979.23 is: 9,631.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,644.64 : 17,449.56 = 6,979.23 : x
  2. Step 2: Convert to fraction form
    12,644.64/17,449.56 = 6,979.23/x
  3. Step 3: Cross multiply
    12,644.64x = 17,449.56 × 6,979.23
  4. Step 4: Simplify right side
    12,644.64x = 121,784,492.64
  5. Step 5: Solve for x
    x = 121,784,492.64/12,644.64
  6. Step 6: Final answer
    x = 9,631.31

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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.