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Finding the Fourth Proportional to 11,807.28, 17,706.60 and 4,878

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Solution

The fourth proportional to 11,807.28, 17,706.60 and 4,878 is: 7,315.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,807.28 : 17,706.60 = 4,878 : x
  2. Step 2: Convert to fraction form
    11,807.28/17,706.60 = 4,878/x
  3. Step 3: Cross multiply
    11,807.28x = 17,706.60 × 4,878
  4. Step 4: Simplify right side
    11,807.28x = 86,372,794.80
  5. Step 5: Solve for x
    x = 86,372,794.80/11,807.28
  6. Step 6: Final answer
    x = 7,315.22

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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.