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Finding the Fourth Proportional to 18,985,858.40, 28,480,115.88 and 9,398,662.76

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Solution

The fourth proportional to 18,985,858.40, 28,480,115.88 and 9,398,662.76 is: 14,098,651.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,985,858.40 : 28,480,115.88 = 9,398,662.76 : x
  2. Step 2: Convert to fraction form
    18,985,858.40/28,480,115.88 = 9,398,662.76/x
  3. Step 3: Cross multiply
    18,985,858.40x = 28,480,115.88 × 9,398,662.76
  4. Step 4: Simplify right side
    18,985,858.40x = 267,675,004,521,840.62
  5. Step 5: Solve for x
    x = 267,675,004,521,840.62/18,985,858.40
  6. Step 6: Final answer
    x = 14,098,651.68

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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.