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Finding the Fourth Proportional to 8,477.75, 11,699.30 and 5,165.75

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Solution

The fourth proportional to 8,477.75, 11,699.30 and 5,165.75 is: 7,128.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,477.75 : 11,699.30 = 5,165.75 : x
  2. Step 2: Convert to fraction form
    8,477.75/11,699.30 = 5,165.75/x
  3. Step 3: Cross multiply
    8,477.75x = 11,699.30 × 5,165.75
  4. Step 4: Simplify right side
    8,477.75x = 60,435,633.15
  5. Step 5: Solve for x
    x = 60,435,633.15/8,477.75
  6. Step 6: Final answer
    x = 7,128.74

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1.5x scale

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.