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Finding the Fourth Proportional to 18,893,828.80, 28,298,752.80 and 14,620,139.20

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Solution

The fourth proportional to 18,893,828.80, 28,298,752.80 and 14,620,139.20 is: 21,897,716.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,893,828.80 : 28,298,752.80 = 14,620,139.20 : x
  2. Step 2: Convert to fraction form
    18,893,828.80/28,298,752.80 = 14,620,139.20/x
  3. Step 3: Cross multiply
    18,893,828.80x = 28,298,752.80 × 14,620,139.20
  4. Step 4: Simplify right side
    18,893,828.80x = 413,731,705,122,389.75
  5. Step 5: Solve for x
    x = 413,731,705,122,389.75/18,893,828.80
  6. Step 6: Final answer
    x = 21,897,716.42

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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.