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Finding the Fourth Proportional to 18,668,840.88, 28,000,899.36 and 7,317,261.12

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Solution

The fourth proportional to 18,668,840.88, 28,000,899.36 and 7,317,261.12 is: 10,974,965.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668,840.88 : 28,000,899.36 = 7,317,261.12 : x
  2. Step 2: Convert to fraction form
    18,668,840.88/28,000,899.36 = 7,317,261.12/x
  3. Step 3: Cross multiply
    18,668,840.88x = 28,000,899.36 × 7,317,261.12
  4. Step 4: Simplify right side
    18,668,840.88x = 204,889,892,211,960.88
  5. Step 5: Solve for x
    x = 204,889,892,211,960.88/18,668,840.88
  6. Step 6: Final answer
    x = 10,974,965.91

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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.