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Finding the Fourth Proportional to 6,487.67, 8,954.21 and 5,171.69

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Solution

The fourth proportional to 6,487.67, 8,954.21 and 5,171.69 is: 7,137.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,487.67 : 8,954.21 = 5,171.69 : x
  2. Step 2: Convert to fraction form
    6,487.67/8,954.21 = 5,171.69/x
  3. Step 3: Cross multiply
    6,487.67x = 8,954.21 × 5,171.69
  4. Step 4: Simplify right side
    6,487.67x = 46,308,398.31
  5. Step 5: Solve for x
    x = 46,308,398.31/6,487.67
  6. Step 6: Final answer
    x = 7,137.91

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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.