Home / 6,391.52-8,821.61-3,739.58

Finding the Fourth Proportional to 6,391.52, 8,821.61 and 3,739.58

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Solution

The fourth proportional to 6,391.52, 8,821.61 and 3,739.58 is: 5,161.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,391.52 : 8,821.61 = 3,739.58 : x
  2. Step 2: Convert to fraction form
    6,391.52/8,821.61 = 3,739.58/x
  3. Step 3: Cross multiply
    6,391.52x = 8,821.61 × 3,739.58
  4. Step 4: Simplify right side
    6,391.52x = 32,989,116.32
  5. Step 5: Solve for x
    x = 32,989,116.32/6,391.52
  6. Step 6: Final answer
    x = 5,161.39

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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.