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Finding the Fourth Proportional to 18,889,620.80, 28,397,416.80 and 16,118,254.40

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Solution

The fourth proportional to 18,889,620.80, 28,397,416.80 and 16,118,254.40 is: 24,231,126.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,889,620.80 : 28,397,416.80 = 16,118,254.40 : x
  2. Step 2: Convert to fraction form
    18,889,620.80/28,397,416.80 = 16,118,254.40/x
  3. Step 3: Cross multiply
    18,889,620.80x = 28,397,416.80 × 16,118,254.40
  4. Step 4: Simplify right side
    18,889,620.80x = 457,716,788,285,233.94
  5. Step 5: Solve for x
    x = 457,716,788,285,233.94/18,889,620.80
  6. Step 6: Final answer
    x = 24,231,126.35

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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.