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Finding the Fourth Proportional to 21,409,978.14, 29,544,979.53 and 11,620,212.15

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Solution

The fourth proportional to 21,409,978.14, 29,544,979.53 and 11,620,212.15 is: 16,035,463.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,409,978.14 : 29,544,979.53 = 11,620,212.15 : x
  2. Step 2: Convert to fraction form
    21,409,978.14/29,544,979.53 = 11,620,212.15/x
  3. Step 3: Cross multiply
    21,409,978.14x = 29,544,979.53 × 11,620,212.15
  4. Step 4: Simplify right side
    21,409,978.14x = 343,318,930,106,007.31
  5. Step 5: Solve for x
    x = 343,318,930,106,007.31/21,409,978.14
  6. Step 6: Final answer
    x = 16,035,463.83

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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.