Home / 13,206.72-19,812.96-3,972

Finding the Fourth Proportional to 13,206.72, 19,812.96 and 3,972

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Solution

The fourth proportional to 13,206.72, 19,812.96 and 3,972 is: 5,958.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,206.72 : 19,812.96 = 3,972 : x
  2. Step 2: Convert to fraction form
    13,206.72/19,812.96 = 3,972/x
  3. Step 3: Cross multiply
    13,206.72x = 19,812.96 × 3,972
  4. Step 4: Simplify right side
    13,206.72x = 78,697,077.12
  5. Step 5: Solve for x
    x = 78,697,077.12/13,206.72
  6. Step 6: Final answer
    x = 5,958.87

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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.