Home / 12,190.55-18,285.89-3,425.54

Finding the Fourth Proportional to 12,190.55, 18,285.89 and 3,425.54

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Solution

The fourth proportional to 12,190.55, 18,285.89 and 3,425.54 is: 5,138.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,190.55 : 18,285.89 = 3,425.54 : x
  2. Step 2: Convert to fraction form
    12,190.55/18,285.89 = 3,425.54/x
  3. Step 3: Cross multiply
    12,190.55x = 18,285.89 × 3,425.54
  4. Step 4: Simplify right side
    12,190.55x = 62,638,939.07
  5. Step 5: Solve for x
    x = 62,638,939.07/12,190.55
  6. Step 6: Final answer
    x = 5,138.32

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1.5x scale

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.