Home / 6,989.39-9,647.25-4,120.62

Finding the Fourth Proportional to 6,989.39, 9,647.25 and 4,120.62

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Solution

The fourth proportional to 6,989.39, 9,647.25 and 4,120.62 is: 5,687.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,989.39 : 9,647.25 = 4,120.62 : x
  2. Step 2: Convert to fraction form
    6,989.39/9,647.25 = 4,120.62/x
  3. Step 3: Cross multiply
    6,989.39x = 9,647.25 × 4,120.62
  4. Step 4: Simplify right side
    6,989.39x = 39,752,677.11
  5. Step 5: Solve for x
    x = 39,752,677.11/6,989.39
  6. Step 6: Final answer
    x = 5,687.58

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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.