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Finding the Fourth Proportional to 20,998,625.60, 28,978,097.28 and 11,340,833.60

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Solution

The fourth proportional to 20,998,625.60, 28,978,097.28 and 11,340,833.60 is: 15,650,347.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,998,625.60 : 28,978,097.28 = 11,340,833.60 : x
  2. Step 2: Convert to fraction form
    20,998,625.60/28,978,097.28 = 11,340,833.60/x
  3. Step 3: Cross multiply
    20,998,625.60x = 28,978,097.28 × 11,340,833.60
  4. Step 4: Simplify right side
    20,998,625.60x = 328,635,779,297,092.62
  5. Step 5: Solve for x
    x = 328,635,779,297,092.62/20,998,625.60
  6. Step 6: Final answer
    x = 15,650,347.10

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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.