Home / 21,668,811.78-29,902,769.46-11,879,078.16

Finding the Fourth Proportional to 21,668,811.78, 29,902,769.46 and 11,879,078.16

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Solution

The fourth proportional to 21,668,811.78, 29,902,769.46 and 11,879,078.16 is: 16,393,023.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,668,811.78 : 29,902,769.46 = 11,879,078.16 : x
  2. Step 2: Convert to fraction form
    21,668,811.78/29,902,769.46 = 11,879,078.16/x
  3. Step 3: Cross multiply
    21,668,811.78x = 29,902,769.46 × 11,879,078.16
  4. Step 4: Simplify right side
    21,668,811.78x = 355,217,335,615,801
  5. Step 5: Solve for x
    x = 355,217,335,615,801/21,668,811.78
  6. Step 6: Final answer
    x = 16,393,023.26

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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.