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Finding the Fourth Proportional to 8,683.40, 13,005.90 and 3,486.60

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Solution

The fourth proportional to 8,683.40, 13,005.90 and 3,486.60 is: 5,222.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,683.40 : 13,005.90 = 3,486.60 : x
  2. Step 2: Convert to fraction form
    8,683.40/13,005.90 = 3,486.60/x
  3. Step 3: Cross multiply
    8,683.40x = 13,005.90 × 3,486.60
  4. Step 4: Simplify right side
    8,683.40x = 45,346,370.94
  5. Step 5: Solve for x
    x = 45,346,370.94/8,683.40
  6. Step 6: Final answer
    x = 5,222.19

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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.