Home / 20,320.38-30,483-7,170.03

Finding the Fourth Proportional to 20,320.38, 30,483 and 7,170.03

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Solution

The fourth proportional to 20,320.38, 30,483 and 7,170.03 is: 10,755.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.38 : 30,483 = 7,170.03 : x
  2. Step 2: Convert to fraction form
    20,320.38/30,483 = 7,170.03/x
  3. Step 3: Cross multiply
    20,320.38x = 30,483 × 7,170.03
  4. Step 4: Simplify right side
    20,320.38x = 218,564,024.49
  5. Step 5: Solve for x
    x = 218,564,024.49/20,320.38
  6. Step 6: Final answer
    x = 10,755.90

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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.