Home / 7,175.40-10,761.84-1,980.12

Finding the Fourth Proportional to 7,175.40, 10,761.84 and 1,980.12

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Solution

The fourth proportional to 7,175.40, 10,761.84 and 1,980.12 is: 2,969.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,175.40 : 10,761.84 = 1,980.12 : x
  2. Step 2: Convert to fraction form
    7,175.40/10,761.84 = 1,980.12/x
  3. Step 3: Cross multiply
    7,175.40x = 10,761.84 × 1,980.12
  4. Step 4: Simplify right side
    7,175.40x = 21,309,734.62
  5. Step 5: Solve for x
    x = 21,309,734.62/7,175.40
  6. Step 6: Final answer
    x = 2,969.83

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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.