Home / 20,919.78-31,368.33-7,059.06

Finding the Fourth Proportional to 20,919.78, 31,368.33 and 7,059.06

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Solution

The fourth proportional to 20,919.78, 31,368.33 and 7,059.06 is: 10,584.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919.78 : 31,368.33 = 7,059.06 : x
  2. Step 2: Convert to fraction form
    20,919.78/31,368.33 = 7,059.06/x
  3. Step 3: Cross multiply
    20,919.78x = 31,368.33 × 7,059.06
  4. Step 4: Simplify right side
    20,919.78x = 221,430,923.57
  5. Step 5: Solve for x
    x = 221,430,923.57/20,919.78
  6. Step 6: Final answer
    x = 10,584.76

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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.