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Finding the Fourth Proportional to 11,706.12, 17,560.80 and 4,779

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Solution

The fourth proportional to 11,706.12, 17,560.80 and 4,779 is: 7,169.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,706.12 : 17,560.80 = 4,779 : x
  2. Step 2: Convert to fraction form
    11,706.12/17,560.80 = 4,779/x
  3. Step 3: Cross multiply
    11,706.12x = 17,560.80 × 4,779
  4. Step 4: Simplify right side
    11,706.12x = 83,923,063.20
  5. Step 5: Solve for x
    x = 83,923,063.20/11,706.12
  6. Step 6: Final answer
    x = 7,169.16

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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.