Home / 12,081.48-18,121.38-4,289.16

Finding the Fourth Proportional to 12,081.48, 18,121.38 and 4,289.16

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Solution

The fourth proportional to 12,081.48, 18,121.38 and 4,289.16 is: 6,433.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,081.48 : 18,121.38 = 4,289.16 : x
  2. Step 2: Convert to fraction form
    12,081.48/18,121.38 = 4,289.16/x
  3. Step 3: Cross multiply
    12,081.48x = 18,121.38 × 4,289.16
  4. Step 4: Simplify right side
    12,081.48x = 77,725,498.24
  5. Step 5: Solve for x
    x = 77,725,498.24/12,081.48
  6. Step 6: Final answer
    x = 6,433.44

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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.