Home / 12,081.48-18,121.26-4,289.28

Finding the Fourth Proportional to 12,081.48, 18,121.26 and 4,289.28

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Solution

The fourth proportional to 12,081.48, 18,121.26 and 4,289.28 is: 6,433.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,081.48 : 18,121.26 = 4,289.28 : x
  2. Step 2: Convert to fraction form
    12,081.48/18,121.26 = 4,289.28/x
  3. Step 3: Cross multiply
    12,081.48x = 18,121.26 × 4,289.28
  4. Step 4: Simplify right side
    12,081.48x = 77,727,158.09
  5. Step 5: Solve for x
    x = 77,727,158.09/12,081.48
  6. Step 6: Final answer
    x = 6,433.58

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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.