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Finding the Fourth Proportional to 12,739.25, 17,580.30 and 7,150.25

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Solution

The fourth proportional to 12,739.25, 17,580.30 and 7,150.25 is: 9,867.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,739.25 : 17,580.30 = 7,150.25 : x
  2. Step 2: Convert to fraction form
    12,739.25/17,580.30 = 7,150.25/x
  3. Step 3: Cross multiply
    12,739.25x = 17,580.30 × 7,150.25
  4. Step 4: Simplify right side
    12,739.25x = 125,703,540.08
  5. Step 5: Solve for x
    x = 125,703,540.08/12,739.25
  6. Step 6: Final answer
    x = 9,867.42

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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.