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Finding the Fourth Proportional to 19,579,391.15, 27,017,978 and 11,319,985.69

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Solution

The fourth proportional to 19,579,391.15, 27,017,978 and 11,319,985.69 is: 15,620,665.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,579,391.15 : 27,017,978 = 11,319,985.69 : x
  2. Step 2: Convert to fraction form
    19,579,391.15/27,017,978 = 11,319,985.69/x
  3. Step 3: Cross multiply
    19,579,391.15x = 27,017,978 × 11,319,985.69
  4. Step 4: Simplify right side
    19,579,391.15x = 305,843,124,332,734.81
  5. Step 5: Solve for x
    x = 305,843,124,332,734.81/19,579,391.15
  6. Step 6: Final answer
    x = 15,620,665.73

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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.