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Finding the Fourth Proportional to 38,766,404.90, 53,497,992.57 and 21,363,374.54

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Solution

The fourth proportional to 38,766,404.90, 53,497,992.57 and 21,363,374.54 is: 29,481,651.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,766,404.90 : 53,497,992.57 = 21,363,374.54 : x
  2. Step 2: Convert to fraction form
    38,766,404.90/53,497,992.57 = 21,363,374.54/x
  3. Step 3: Cross multiply
    38,766,404.90x = 53,497,992.57 × 21,363,374.54
  4. Step 4: Simplify right side
    38,766,404.90x = 1,142,897,652,411,047.25
  5. Step 5: Solve for x
    x = 1,142,897,652,411,047.25/38,766,404.90
  6. Step 6: Final answer
    x = 29,481,651.84

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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.