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Finding the Fourth Proportional to 18,574,016.80, 27,805,912.80 and 13,802,857.60

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Solution

The fourth proportional to 18,574,016.80, 27,805,912.80 and 13,802,857.60 is: 20,663,330.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,574,016.80 : 27,805,912.80 = 13,802,857.60 : x
  2. Step 2: Convert to fraction form
    18,574,016.80/27,805,912.80 = 13,802,857.60/x
  3. Step 3: Cross multiply
    18,574,016.80x = 27,805,912.80 × 13,802,857.60
  4. Step 4: Simplify right side
    18,574,016.80x = 383,801,054,816,417.25
  5. Step 5: Solve for x
    x = 383,801,054,816,417.25/18,574,016.80
  6. Step 6: Final answer
    x = 20,663,330.88

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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.