Home / 7,120.49-10,678.61-2,190.02

Finding the Fourth Proportional to 7,120.49, 10,678.61 and 2,190.02

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Solution

The fourth proportional to 7,120.49, 10,678.61 and 2,190.02 is: 3,284.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.49 : 10,678.61 = 2,190.02 : x
  2. Step 2: Convert to fraction form
    7,120.49/10,678.61 = 2,190.02/x
  3. Step 3: Cross multiply
    7,120.49x = 10,678.61 × 2,190.02
  4. Step 4: Simplify right side
    7,120.49x = 23,386,305.13
  5. Step 5: Solve for x
    x = 23,386,305.13/7,120.49
  6. Step 6: Final answer
    x = 3,284.37

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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.