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Finding the Fourth Proportional to 18,461,978.44, 25,479,064.33 and 10,203,653.21

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Solution

The fourth proportional to 18,461,978.44, 25,479,064.33 and 10,203,653.21 is: 14,081,889.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,461,978.44 : 25,479,064.33 = 10,203,653.21 : x
  2. Step 2: Convert to fraction form
    18,461,978.44/25,479,064.33 = 10,203,653.21/x
  3. Step 3: Cross multiply
    18,461,978.44x = 25,479,064.33 × 10,203,653.21
  4. Step 4: Simplify right side
    18,461,978.44x = 259,979,536,385,696.56
  5. Step 5: Solve for x
    x = 259,979,536,385,696.56/18,461,978.44
  6. Step 6: Final answer
    x = 14,081,889.29

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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.