Home / 12,690.75-19,044.77-7,629.33

Finding the Fourth Proportional to 12,690.75, 19,044.77 and 7,629.33

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Solution

The fourth proportional to 12,690.75, 19,044.77 and 7,629.33 is: 11,449.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,690.75 : 19,044.77 = 7,629.33 : x
  2. Step 2: Convert to fraction form
    12,690.75/19,044.77 = 7,629.33/x
  3. Step 3: Cross multiply
    12,690.75x = 19,044.77 × 7,629.33
  4. Step 4: Simplify right side
    12,690.75x = 145,298,796.96
  5. Step 5: Solve for x
    x = 145,298,796.96/12,690.75
  6. Step 6: Final answer
    x = 11,449.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.