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Finding the Fourth Proportional to 19,858,879.60, 29,791,818.60 and 7,086,799.60

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Solution

The fourth proportional to 19,858,879.60, 29,791,818.60 and 7,086,799.60 is: 10,631,448.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,858,879.60 : 29,791,818.60 = 7,086,799.60 : x
  2. Step 2: Convert to fraction form
    19,858,879.60/29,791,818.60 = 7,086,799.60/x
  3. Step 3: Cross multiply
    19,858,879.60x = 29,791,818.60 × 7,086,799.60
  4. Step 4: Simplify right side
    19,858,879.60x = 211,128,648,137,752.56
  5. Step 5: Solve for x
    x = 211,128,648,137,752.56/19,858,879.60
  6. Step 6: Final answer
    x = 10,631,448.12

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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.