Home / 30,138.21-45,190.31-12,363.93

Finding the Fourth Proportional to 30,138.21, 45,190.31 and 12,363.93

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Solution

The fourth proportional to 30,138.21, 45,190.31 and 12,363.93 is: 18,538.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,138.21 : 45,190.31 = 12,363.93 : x
  2. Step 2: Convert to fraction form
    30,138.21/45,190.31 = 12,363.93/x
  3. Step 3: Cross multiply
    30,138.21x = 45,190.31 × 12,363.93
  4. Step 4: Simplify right side
    30,138.21x = 558,729,767.70
  5. Step 5: Solve for x
    x = 558,729,767.70/30,138.21
  6. Step 6: Final answer
    x = 18,538.92

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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.