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Finding the Fourth Proportional to 12,965,713.70, 19,448,570.55 and 12,221,696.30

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Solution

The fourth proportional to 12,965,713.70, 19,448,570.55 and 12,221,696.30 is: 18,332,544.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,965,713.70 : 19,448,570.55 = 12,221,696.30 : x
  2. Step 2: Convert to fraction form
    12,965,713.70/19,448,570.55 = 12,221,696.30/x
  3. Step 3: Cross multiply
    12,965,713.70x = 19,448,570.55 × 12,221,696.30
  4. Step 4: Simplify right side
    12,965,713.70x = 237,694,522,731,224
  5. Step 5: Solve for x
    x = 237,694,522,731,224/12,965,713.70
  6. Step 6: Final answer
    x = 18,332,544.45

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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.