Home / 30,128.89-41,578.95-18,189.91

Finding the Fourth Proportional to 30,128.89, 41,578.95 and 18,189.91

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Solution

The fourth proportional to 30,128.89, 41,578.95 and 18,189.91 is: 25,102.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,128.89 : 41,578.95 = 18,189.91 : x
  2. Step 2: Convert to fraction form
    30,128.89/41,578.95 = 18,189.91/x
  3. Step 3: Cross multiply
    30,128.89x = 41,578.95 × 18,189.91
  4. Step 4: Simplify right side
    30,128.89x = 756,317,358.39
  5. Step 5: Solve for x
    x = 756,317,358.39/30,128.89
  6. Step 6: Final answer
    x = 25,102.73

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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.