Home / 28,715.18-43,067.90-7,938.68

Finding the Fourth Proportional to 28,715.18, 43,067.90 and 7,938.68

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Solution

The fourth proportional to 28,715.18, 43,067.90 and 7,938.68 is: 11,906.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,715.18 : 43,067.90 = 7,938.68 : x
  2. Step 2: Convert to fraction form
    28,715.18/43,067.90 = 7,938.68/x
  3. Step 3: Cross multiply
    28,715.18x = 43,067.90 × 7,938.68
  4. Step 4: Simplify right side
    28,715.18x = 341,902,276.37
  5. Step 5: Solve for x
    x = 341,902,276.37/28,715.18
  6. Step 6: Final answer
    x = 11,906.67

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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.