Home / 7,121.56-10,678.06-2,956.54

Finding the Fourth Proportional to 7,121.56, 10,678.06 and 2,956.54

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Solution

The fourth proportional to 7,121.56, 10,678.06 and 2,956.54 is: 4,433.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.56 : 10,678.06 = 2,956.54 : x
  2. Step 2: Convert to fraction form
    7,121.56/10,678.06 = 2,956.54/x
  3. Step 3: Cross multiply
    7,121.56x = 10,678.06 × 2,956.54
  4. Step 4: Simplify right side
    7,121.56x = 31,570,111.51
  5. Step 5: Solve for x
    x = 31,570,111.51/7,121.56
  6. Step 6: Final answer
    x = 4,433.03

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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.