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Finding the Fourth Proportional to 5,878.36, 8,111.28 and 3,520

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Solution

The fourth proportional to 5,878.36, 8,111.28 and 3,520 is: 4,857.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,878.36 : 8,111.28 = 3,520 : x
  2. Step 2: Convert to fraction form
    5,878.36/8,111.28 = 3,520/x
  3. Step 3: Cross multiply
    5,878.36x = 8,111.28 × 3,520
  4. Step 4: Simplify right side
    5,878.36x = 28,551,705.60
  5. Step 5: Solve for x
    x = 28,551,705.60/5,878.36
  6. Step 6: Final answer
    x = 4,857.09

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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.