Home / 7,121.82-9,827.45-4,137.61

Finding the Fourth Proportional to 7,121.82, 9,827.45 and 4,137.61

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Solution

The fourth proportional to 7,121.82, 9,827.45 and 4,137.61 is: 5,709.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.82 : 9,827.45 = 4,137.61 : x
  2. Step 2: Convert to fraction form
    7,121.82/9,827.45 = 4,137.61/x
  3. Step 3: Cross multiply
    7,121.82x = 9,827.45 × 4,137.61
  4. Step 4: Simplify right side
    7,121.82x = 40,662,162.51
  5. Step 5: Solve for x
    x = 40,662,162.51/7,121.82
  6. Step 6: Final answer
    x = 5,709.52

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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.