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Finding the Fourth Proportional to 19,318,695.60, 28,978,043.40 and 17,858,881.20

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Solution

The fourth proportional to 19,318,695.60, 28,978,043.40 and 17,858,881.20 is: 26,788,321.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,318,695.60 : 28,978,043.40 = 17,858,881.20 : x
  2. Step 2: Convert to fraction form
    19,318,695.60/28,978,043.40 = 17,858,881.20/x
  3. Step 3: Cross multiply
    19,318,695.60x = 28,978,043.40 × 17,858,881.20
  4. Step 4: Simplify right side
    19,318,695.60x = 517,515,434,489,044.06
  5. Step 5: Solve for x
    x = 517,515,434,489,044.06/19,318,695.60
  6. Step 6: Final answer
    x = 26,788,321.80

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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.