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Finding the Fourth Proportional to 12,644.37, 17,449.01 and 6,979.11

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Solution

The fourth proportional to 12,644.37, 17,449.01 and 6,979.11 is: 9,631.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,644.37 : 17,449.01 = 6,979.11 : x
  2. Step 2: Convert to fraction form
    12,644.37/17,449.01 = 6,979.11/x
  3. Step 3: Cross multiply
    12,644.37x = 17,449.01 × 6,979.11
  4. Step 4: Simplify right side
    12,644.37x = 121,778,574.36
  5. Step 5: Solve for x
    x = 121,778,574.36/12,644.37
  6. Step 6: Final answer
    x = 9,631.05

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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.