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Finding the Fourth Proportional to 18,914,270.20, 28,371,405.30 and 13,141,367.80

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Solution

The fourth proportional to 18,914,270.20, 28,371,405.30 and 13,141,367.80 is: 19,712,051.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,914,270.20 : 28,371,405.30 = 13,141,367.80 : x
  2. Step 2: Convert to fraction form
    18,914,270.20/28,371,405.30 = 13,141,367.80/x
  3. Step 3: Cross multiply
    18,914,270.20x = 28,371,405.30 × 13,141,367.80
  4. Step 4: Simplify right side
    18,914,270.20x = 372,839,072,050,169.38
  5. Step 5: Solve for x
    x = 372,839,072,050,169.38/18,914,270.20
  6. Step 6: Final answer
    x = 19,712,051.70

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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.