Home / 6,378.05-8,801.24-3,989.09

Finding the Fourth Proportional to 6,378.05, 8,801.24 and 3,989.09

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Solution

The fourth proportional to 6,378.05, 8,801.24 and 3,989.09 is: 5,504.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,378.05 : 8,801.24 = 3,989.09 : x
  2. Step 2: Convert to fraction form
    6,378.05/8,801.24 = 3,989.09/x
  3. Step 3: Cross multiply
    6,378.05x = 8,801.24 × 3,989.09
  4. Step 4: Simplify right side
    6,378.05x = 35,108,970.45
  5. Step 5: Solve for x
    x = 35,108,970.45/6,378.05
  6. Step 6: Final answer
    x = 5,504.66

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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.