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Finding the Fourth Proportional to 11,831.21, 17,759.10 and 8,714.72

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Solution

The fourth proportional to 11,831.21, 17,759.10 and 8,714.72 is: 13,081.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,831.21 : 17,759.10 = 8,714.72 : x
  2. Step 2: Convert to fraction form
    11,831.21/17,759.10 = 8,714.72/x
  3. Step 3: Cross multiply
    11,831.21x = 17,759.10 × 8,714.72
  4. Step 4: Simplify right side
    11,831.21x = 154,765,583.95
  5. Step 5: Solve for x
    x = 154,765,583.95/11,831.21
  6. Step 6: Final answer
    x = 13,081.13

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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.