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Finding the Fourth Proportional to 6,435.80, 8,881.75 and 3,917.51

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Solution

The fourth proportional to 6,435.80, 8,881.75 and 3,917.51 is: 5,406.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,435.80 : 8,881.75 = 3,917.51 : x
  2. Step 2: Convert to fraction form
    6,435.80/8,881.75 = 3,917.51/x
  3. Step 3: Cross multiply
    6,435.80x = 8,881.75 × 3,917.51
  4. Step 4: Simplify right side
    6,435.80x = 34,794,344.44
  5. Step 5: Solve for x
    x = 34,794,344.44/6,435.80
  6. Step 6: Final answer
    x = 5,406.37

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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.