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Finding the Fourth Proportional to 12,644.10, 17,448.82 and 6,979.19

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Solution

The fourth proportional to 12,644.10, 17,448.82 and 6,979.19 is: 9,631.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,644.10 : 17,448.82 = 6,979.19 : x
  2. Step 2: Convert to fraction form
    12,644.10/17,448.82 = 6,979.19/x
  3. Step 3: Cross multiply
    12,644.10x = 17,448.82 × 6,979.19
  4. Step 4: Simplify right side
    12,644.10x = 121,778,525.36
  5. Step 5: Solve for x
    x = 121,778,525.36/12,644.10
  6. Step 6: Final answer
    x = 9,631.25

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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.