Home / 7,121.48-9,825.46-4,136.74

Finding the Fourth Proportional to 7,121.48, 9,825.46 and 4,136.74

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Solution

The fourth proportional to 7,121.48, 9,825.46 and 4,136.74 is: 5,707.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.48 : 9,825.46 = 4,136.74 : x
  2. Step 2: Convert to fraction form
    7,121.48/9,825.46 = 4,136.74/x
  3. Step 3: Cross multiply
    7,121.48x = 9,825.46 × 4,136.74
  4. Step 4: Simplify right side
    7,121.48x = 40,645,338.49
  5. Step 5: Solve for x
    x = 40,645,338.49/7,121.48
  6. Step 6: Final answer
    x = 5,707.43

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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.