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Finding the Fourth Proportional to 27,980,679.51, 41,978,805.86 and 12,207,569.58

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Solution

The fourth proportional to 27,980,679.51, 41,978,805.86 and 12,207,569.58 is: 18,314,751.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,980,679.51 : 41,978,805.86 = 12,207,569.58 : x
  2. Step 2: Convert to fraction form
    27,980,679.51/41,978,805.86 = 12,207,569.58/x
  3. Step 3: Cross multiply
    27,980,679.51x = 41,978,805.86 × 12,207,569.58
  4. Step 4: Simplify right side
    27,980,679.51x = 512,459,193,451,780.62
  5. Step 5: Solve for x
    x = 512,459,193,451,780.62/27,980,679.51
  6. Step 6: Final answer
    x = 18,314,751.55

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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.