Home / 12,685,965.89-17,504,100.78-7,721,081.70

Finding the Fourth Proportional to 12,685,965.89, 17,504,100.78 and 7,721,081.70

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Solution

The fourth proportional to 12,685,965.89, 17,504,100.78 and 7,721,081.70 is: 10,653,551.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,685,965.89 : 17,504,100.78 = 7,721,081.70 : x
  2. Step 2: Convert to fraction form
    12,685,965.89/17,504,100.78 = 7,721,081.70/x
  3. Step 3: Cross multiply
    12,685,965.89x = 17,504,100.78 × 7,721,081.70
  4. Step 4: Simplify right side
    12,685,965.89x = 135,150,592,177,969.78
  5. Step 5: Solve for x
    x = 135,150,592,177,969.78/12,685,965.89
  6. Step 6: Final answer
    x = 10,653,551.60

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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.