Home / 21,121,379.47-29,142,507.94-11,954,021.95

Finding the Fourth Proportional to 21,121,379.47, 29,142,507.94 and 11,954,021.95

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Solution

The fourth proportional to 21,121,379.47, 29,142,507.94 and 11,954,021.95 is: 16,493,722.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121,379.47 : 29,142,507.94 = 11,954,021.95 : x
  2. Step 2: Convert to fraction form
    21,121,379.47/29,142,507.94 = 11,954,021.95/x
  3. Step 3: Cross multiply
    21,121,379.47x = 29,142,507.94 × 11,954,021.95
  4. Step 4: Simplify right side
    21,121,379.47x = 348,370,179,592,809.25
  5. Step 5: Solve for x
    x = 348,370,179,592,809.25/21,121,379.47
  6. Step 6: Final answer
    x = 16,493,722.87

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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.