Home / 7,120.77-10,681.32-2,190.45

Finding the Fourth Proportional to 7,120.77, 10,681.32 and 2,190.45

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Solution

The fourth proportional to 7,120.77, 10,681.32 and 2,190.45 is: 3,285.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.77 : 10,681.32 = 2,190.45 : x
  2. Step 2: Convert to fraction form
    7,120.77/10,681.32 = 2,190.45/x
  3. Step 3: Cross multiply
    7,120.77x = 10,681.32 × 2,190.45
  4. Step 4: Simplify right side
    7,120.77x = 23,396,897.39
  5. Step 5: Solve for x
    x = 23,396,897.39/7,120.77
  6. Step 6: Final answer
    x = 3,285.73

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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.