Home / 3,942.72-5,913.56-1,021.20

Finding the Fourth Proportional to 3,942.72, 5,913.56 and 1,021.20

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Solution

The fourth proportional to 3,942.72, 5,913.56 and 1,021.20 is: 1,531.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,942.72 : 5,913.56 = 1,021.20 : x
  2. Step 2: Convert to fraction form
    3,942.72/5,913.56 = 1,021.20/x
  3. Step 3: Cross multiply
    3,942.72x = 5,913.56 × 1,021.20
  4. Step 4: Simplify right side
    3,942.72x = 6,038,927.47
  5. Step 5: Solve for x
    x = 6,038,927.47/3,942.72
  6. Step 6: Final answer
    x = 1,531.67

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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.