Home / 6,890.72-9,507.62-3,905.87

Finding the Fourth Proportional to 6,890.72, 9,507.62 and 3,905.87

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Solution

The fourth proportional to 6,890.72, 9,507.62 and 3,905.87 is: 5,389.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,890.72 : 9,507.62 = 3,905.87 : x
  2. Step 2: Convert to fraction form
    6,890.72/9,507.62 = 3,905.87/x
  3. Step 3: Cross multiply
    6,890.72x = 9,507.62 × 3,905.87
  4. Step 4: Simplify right side
    6,890.72x = 37,135,489.96
  5. Step 5: Solve for x
    x = 37,135,489.96/6,890.72
  6. Step 6: Final answer
    x = 5,389.21

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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.