Home / 6,431.72-9,643.80-3,141.50

Finding the Fourth Proportional to 6,431.72, 9,643.80 and 3,141.50

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Solution

The fourth proportional to 6,431.72, 9,643.80 and 3,141.50 is: 4,710.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,431.72 : 9,643.80 = 3,141.50 : x
  2. Step 2: Convert to fraction form
    6,431.72/9,643.80 = 3,141.50/x
  3. Step 3: Cross multiply
    6,431.72x = 9,643.80 × 3,141.50
  4. Step 4: Simplify right side
    6,431.72x = 30,295,997.70
  5. Step 5: Solve for x
    x = 30,295,997.70/6,431.72
  6. Step 6: Final answer
    x = 4,710.40

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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.