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Finding the Fourth Proportional to 18,577,679.72, 27,856,555.05 and 7,782,784.40

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Solution

The fourth proportional to 18,577,679.72, 27,856,555.05 and 7,782,784.40 is: 11,670,002.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,577,679.72 : 27,856,555.05 = 7,782,784.40 : x
  2. Step 2: Convert to fraction form
    18,577,679.72/27,856,555.05 = 7,782,784.40/x
  3. Step 3: Cross multiply
    18,577,679.72x = 27,856,555.05 × 7,782,784.40
  4. Step 4: Simplify right side
    18,577,679.72x = 216,801,562,080,881.25
  5. Step 5: Solve for x
    x = 216,801,562,080,881.25/18,577,679.72
  6. Step 6: Final answer
    x = 11,670,002.14

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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.