Home / 7,145.45-10,721.26-3,857.89

Finding the Fourth Proportional to 7,145.45, 10,721.26 and 3,857.89

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Solution

The fourth proportional to 7,145.45, 10,721.26 and 3,857.89 is: 5,788.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,145.45 : 10,721.26 = 3,857.89 : x
  2. Step 2: Convert to fraction form
    7,145.45/10,721.26 = 3,857.89/x
  3. Step 3: Cross multiply
    7,145.45x = 10,721.26 × 3,857.89
  4. Step 4: Simplify right side
    7,145.45x = 41,361,441.74
  5. Step 5: Solve for x
    x = 41,361,441.74/7,145.45
  6. Step 6: Final answer
    x = 5,788.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.