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Finding the Fourth Proportional to 12,831.66, 17,713.10 and 7,797.51

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Solution

The fourth proportional to 12,831.66, 17,713.10 and 7,797.51 is: 10,763.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,831.66 : 17,713.10 = 7,797.51 : x
  2. Step 2: Convert to fraction form
    12,831.66/17,713.10 = 7,797.51/x
  3. Step 3: Cross multiply
    12,831.66x = 17,713.10 × 7,797.51
  4. Step 4: Simplify right side
    12,831.66x = 138,118,035.39
  5. Step 5: Solve for x
    x = 138,118,035.39/12,831.66
  6. Step 6: Final answer
    x = 10,763.85

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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.