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Finding the Fourth Proportional to 8,486, 12,720.32 and 3,558.32

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Solution

The fourth proportional to 8,486, 12,720.32 and 3,558.32 is: 5,333.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,486 : 12,720.32 = 3,558.32 : x
  2. Step 2: Convert to fraction form
    8,486/12,720.32 = 3,558.32/x
  3. Step 3: Cross multiply
    8,486x = 12,720.32 × 3,558.32
  4. Step 4: Simplify right side
    8,486x = 45,262,969.06
  5. Step 5: Solve for x
    x = 45,262,969.06/8,486
  6. Step 6: Final answer
    x = 5,333.84

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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.