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Finding the Fourth Proportional to 8,686.90, 13,027.11 and 3,491.02

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Solution

The fourth proportional to 8,686.90, 13,027.11 and 3,491.02 is: 5,235.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,686.90 : 13,027.11 = 3,491.02 : x
  2. Step 2: Convert to fraction form
    8,686.90/13,027.11 = 3,491.02/x
  3. Step 3: Cross multiply
    8,686.90x = 13,027.11 × 3,491.02
  4. Step 4: Simplify right side
    8,686.90x = 45,477,901.55
  5. Step 5: Solve for x
    x = 45,477,901.55/8,686.90
  6. Step 6: Final answer
    x = 5,235.23

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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.