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Finding the Fourth Proportional to 8,055.65, 11,120.74 and 7,212.97

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Solution

The fourth proportional to 8,055.65, 11,120.74 and 7,212.97 is: 9,957.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,055.65 : 11,120.74 = 7,212.97 : x
  2. Step 2: Convert to fraction form
    8,055.65/11,120.74 = 7,212.97/x
  3. Step 3: Cross multiply
    8,055.65x = 11,120.74 × 7,212.97
  4. Step 4: Simplify right side
    8,055.65x = 80,213,564.00
  5. Step 5: Solve for x
    x = 80,213,564.00/8,055.65
  6. Step 6: Final answer
    x = 9,957.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.