Home / 7,120.71-10,681.24-2,190.38

Finding the Fourth Proportional to 7,120.71, 10,681.24 and 2,190.38

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Solution

The fourth proportional to 7,120.71, 10,681.24 and 2,190.38 is: 3,285.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.71 : 10,681.24 = 2,190.38 : x
  2. Step 2: Convert to fraction form
    7,120.71/10,681.24 = 2,190.38/x
  3. Step 3: Cross multiply
    7,120.71x = 10,681.24 × 2,190.38
  4. Step 4: Simplify right side
    7,120.71x = 23,395,995.70
  5. Step 5: Solve for x
    x = 23,395,995.70/7,120.71
  6. Step 6: Final answer
    x = 3,285.63

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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.