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Finding the Fourth Proportional to 38,766,405.90, 53,497,993.96 and 21,363,375.54

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Solution

The fourth proportional to 38,766,405.90, 53,497,993.96 and 21,363,375.54 is: 29,481,653.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,766,405.90 : 53,497,993.96 = 21,363,375.54 : x
  2. Step 2: Convert to fraction form
    38,766,405.90/53,497,993.96 = 21,363,375.54/x
  3. Step 3: Cross multiply
    38,766,405.90x = 53,497,993.96 × 21,363,375.54
  4. Step 4: Simplify right side
    38,766,405.90x = 1,142,897,735,604,131.75
  5. Step 5: Solve for x
    x = 1,142,897,735,604,131.75/38,766,405.90
  6. Step 6: Final answer
    x = 29,481,653.23

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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.