Home / 20,919.36-31,383.72-7,068

Finding the Fourth Proportional to 20,919.36, 31,383.72 and 7,068

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Solution

The fourth proportional to 20,919.36, 31,383.72 and 7,068 is: 10,603.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919.36 : 31,383.72 = 7,068 : x
  2. Step 2: Convert to fraction form
    20,919.36/31,383.72 = 7,068/x
  3. Step 3: Cross multiply
    20,919.36x = 31,383.72 × 7,068
  4. Step 4: Simplify right side
    20,919.36x = 221,820,132.96
  5. Step 5: Solve for x
    x = 221,820,132.96/20,919.36
  6. Step 6: Final answer
    x = 10,603.58

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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.