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Finding the Fourth Proportional to 5,808.78, 8,712.09 and 2,688.53

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Solution

The fourth proportional to 5,808.78, 8,712.09 and 2,688.53 is: 4,032.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,808.78 : 8,712.09 = 2,688.53 : x
  2. Step 2: Convert to fraction form
    5,808.78/8,712.09 = 2,688.53/x
  3. Step 3: Cross multiply
    5,808.78x = 8,712.09 × 2,688.53
  4. Step 4: Simplify right side
    5,808.78x = 23,422,671.77
  5. Step 5: Solve for x
    x = 23,422,671.77/5,808.78
  6. Step 6: Final answer
    x = 4,032.29

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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.