Home / 28,678.81-43,020.11-7,618.56

Finding the Fourth Proportional to 28,678.81, 43,020.11 and 7,618.56

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Solution

The fourth proportional to 28,678.81, 43,020.11 and 7,618.56 is: 11,428.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,678.81 : 43,020.11 = 7,618.56 : x
  2. Step 2: Convert to fraction form
    28,678.81/43,020.11 = 7,618.56/x
  3. Step 3: Cross multiply
    28,678.81x = 43,020.11 × 7,618.56
  4. Step 4: Simplify right side
    28,678.81x = 327,751,146.96
  5. Step 5: Solve for x
    x = 327,751,146.96/28,678.81
  6. Step 6: Final answer
    x = 11,428.34

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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.