Home / 12,121.61-18,182.41-3,356.60

Finding the Fourth Proportional to 12,121.61, 18,182.41 and 3,356.60

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Solution

The fourth proportional to 12,121.61, 18,182.41 and 3,356.60 is: 5,034.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.61 : 18,182.41 = 3,356.60 : x
  2. Step 2: Convert to fraction form
    12,121.61/18,182.41 = 3,356.60/x
  3. Step 3: Cross multiply
    12,121.61x = 18,182.41 × 3,356.60
  4. Step 4: Simplify right side
    12,121.61x = 61,030,978.10
  5. Step 5: Solve for x
    x = 61,030,978.10/12,121.61
  6. Step 6: Final answer
    x = 5,034.89

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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.