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Finding the Fourth Proportional to 7,272.51, 10,912.40 and 2,891.22

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Solution

The fourth proportional to 7,272.51, 10,912.40 and 2,891.22 is: 4,338.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,272.51 : 10,912.40 = 2,891.22 : x
  2. Step 2: Convert to fraction form
    7,272.51/10,912.40 = 2,891.22/x
  3. Step 3: Cross multiply
    7,272.51x = 10,912.40 × 2,891.22
  4. Step 4: Simplify right side
    7,272.51x = 31,550,149.13
  5. Step 5: Solve for x
    x = 31,550,149.13/7,272.51
  6. Step 6: Final answer
    x = 4,338.28

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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.