Home / 6,721.32-9,276.90-3,890.64

Finding the Fourth Proportional to 6,721.32, 9,276.90 and 3,890.64

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Solution

The fourth proportional to 6,721.32, 9,276.90 and 3,890.64 is: 5,369.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,721.32 : 9,276.90 = 3,890.64 : x
  2. Step 2: Convert to fraction form
    6,721.32/9,276.90 = 3,890.64/x
  3. Step 3: Cross multiply
    6,721.32x = 9,276.90 × 3,890.64
  4. Step 4: Simplify right side
    6,721.32x = 36,093,078.22
  5. Step 5: Solve for x
    x = 36,093,078.22/6,721.32
  6. Step 6: Final answer
    x = 5,369.94

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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.