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Finding the Fourth Proportional to 12,791.85, 17,650.74 and 7,124.82

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Solution

The fourth proportional to 12,791.85, 17,650.74 and 7,124.82 is: 9,831.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,791.85 : 17,650.74 = 7,124.82 : x
  2. Step 2: Convert to fraction form
    12,791.85/17,650.74 = 7,124.82/x
  3. Step 3: Cross multiply
    12,791.85x = 17,650.74 × 7,124.82
  4. Step 4: Simplify right side
    12,791.85x = 125,758,345.37
  5. Step 5: Solve for x
    x = 125,758,345.37/12,791.85
  6. Step 6: Final answer
    x = 9,831.13

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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.