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Finding the Fourth Proportional to 12,651.51, 17,458.63 and 6,986.13

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Solution

The fourth proportional to 12,651.51, 17,458.63 and 6,986.13 is: 9,640.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,651.51 : 17,458.63 = 6,986.13 : x
  2. Step 2: Convert to fraction form
    12,651.51/17,458.63 = 6,986.13/x
  3. Step 3: Cross multiply
    12,651.51x = 17,458.63 × 6,986.13
  4. Step 4: Simplify right side
    12,651.51x = 121,968,258.80
  5. Step 5: Solve for x
    x = 121,968,258.80/12,651.51
  6. Step 6: Final answer
    x = 9,640.61

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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.