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Finding the Fourth Proportional to 19,156,728.90, 28,749,090.15 and 13,488,024.90

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Solution

The fourth proportional to 19,156,728.90, 28,749,090.15 and 13,488,024.90 is: 20,241,892.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,156,728.90 : 28,749,090.15 = 13,488,024.90 : x
  2. Step 2: Convert to fraction form
    19,156,728.90/28,749,090.15 = 13,488,024.90/x
  3. Step 3: Cross multiply
    19,156,728.90x = 28,749,090.15 × 13,488,024.90
  4. Step 4: Simplify right side
    19,156,728.90x = 387,768,443,795,544.75
  5. Step 5: Solve for x
    x = 387,768,443,795,544.75/19,156,728.90
  6. Step 6: Final answer
    x = 20,241,892.33

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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.