Home / 7,121.81-10,684.07-2,959.56

Finding the Fourth Proportional to 7,121.81, 10,684.07 and 2,959.56

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Solution

The fourth proportional to 7,121.81, 10,684.07 and 2,959.56 is: 4,439.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.81 : 10,684.07 = 2,959.56 : x
  2. Step 2: Convert to fraction form
    7,121.81/10,684.07 = 2,959.56/x
  3. Step 3: Cross multiply
    7,121.81x = 10,684.07 × 2,959.56
  4. Step 4: Simplify right side
    7,121.81x = 31,620,131.41
  5. Step 5: Solve for x
    x = 31,620,131.41/7,121.81
  6. Step 6: Final answer
    x = 4,439.90

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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.