Home / 30,129.11-41,578.11-18,190.10

Finding the Fourth Proportional to 30,129.11, 41,578.11 and 18,190.10

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Solution

The fourth proportional to 30,129.11, 41,578.11 and 18,190.10 is: 25,102.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,129.11 : 41,578.11 = 18,190.10 : x
  2. Step 2: Convert to fraction form
    30,129.11/41,578.11 = 18,190.10/x
  3. Step 3: Cross multiply
    30,129.11x = 41,578.11 × 18,190.10
  4. Step 4: Simplify right side
    30,129.11x = 756,309,978.71
  5. Step 5: Solve for x
    x = 756,309,978.71/30,129.11
  6. Step 6: Final answer
    x = 25,102.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.