Home / 30,129.61-41,578.80-18,190.60

Finding the Fourth Proportional to 30,129.61, 41,578.80 and 18,190.60

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Solution

The fourth proportional to 30,129.61, 41,578.80 and 18,190.60 is: 25,102.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,129.61 : 41,578.80 = 18,190.60 : x
  2. Step 2: Convert to fraction form
    30,129.61/41,578.80 = 18,190.60/x
  3. Step 3: Cross multiply
    30,129.61x = 41,578.80 × 18,190.60
  4. Step 4: Simplify right side
    30,129.61x = 756,343,319.28
  5. Step 5: Solve for x
    x = 756,343,319.28/30,129.61
  6. Step 6: Final answer
    x = 25,102.99

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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.