Home / 7,143.75-9,859.57-4,161.35

Finding the Fourth Proportional to 7,143.75, 9,859.57 and 4,161.35

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Solution

The fourth proportional to 7,143.75, 9,859.57 and 4,161.35 is: 5,743.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,143.75 : 9,859.57 = 4,161.35 : x
  2. Step 2: Convert to fraction form
    7,143.75/9,859.57 = 4,161.35/x
  3. Step 3: Cross multiply
    7,143.75x = 9,859.57 × 4,161.35
  4. Step 4: Simplify right side
    7,143.75x = 41,029,072.32
  5. Step 5: Solve for x
    x = 41,029,072.32/7,143.75
  6. Step 6: Final answer
    x = 5,743.36

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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.