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Finding the Fourth Proportional to 11,911.17, 17,868.17 and 3,146.16

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Solution

The fourth proportional to 11,911.17, 17,868.17 and 3,146.16 is: 4,719.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,911.17 : 17,868.17 = 3,146.16 : x
  2. Step 2: Convert to fraction form
    11,911.17/17,868.17 = 3,146.16/x
  3. Step 3: Cross multiply
    11,911.17x = 17,868.17 × 3,146.16
  4. Step 4: Simplify right side
    11,911.17x = 56,216,106.00
  5. Step 5: Solve for x
    x = 56,216,106.00/11,911.17
  6. Step 6: Final answer
    x = 4,719.61

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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.