Home / 7,135.12-9,845.58-3,990.52

Finding the Fourth Proportional to 7,135.12, 9,845.58 and 3,990.52

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Solution

The fourth proportional to 7,135.12, 9,845.58 and 3,990.52 is: 5,506.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,135.12 : 9,845.58 = 3,990.52 : x
  2. Step 2: Convert to fraction form
    7,135.12/9,845.58 = 3,990.52/x
  3. Step 3: Cross multiply
    7,135.12x = 9,845.58 × 3,990.52
  4. Step 4: Simplify right side
    7,135.12x = 39,288,983.90
  5. Step 5: Solve for x
    x = 39,288,983.90/7,135.12
  6. Step 6: Final answer
    x = 5,506.42

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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.