Home / 21,879.36-30,189.72-12,446.16

Finding the Fourth Proportional to 21,879.36, 30,189.72 and 12,446.16

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Solution

The fourth proportional to 21,879.36, 30,189.72 and 12,446.16 is: 17,173.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,879.36 : 30,189.72 = 12,446.16 : x
  2. Step 2: Convert to fraction form
    21,879.36/30,189.72 = 12,446.16/x
  3. Step 3: Cross multiply
    21,879.36x = 30,189.72 × 12,446.16
  4. Step 4: Simplify right side
    21,879.36x = 375,746,085.48
  5. Step 5: Solve for x
    x = 375,746,085.48/21,879.36
  6. Step 6: Final answer
    x = 17,173.54

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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.