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Finding the Fourth Proportional to 18,891,603.40, 28,368,897.90 and 10,378,049.80

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Solution

The fourth proportional to 18,891,603.40, 28,368,897.90 and 10,378,049.80 is: 15,584,375.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891,603.40 : 28,368,897.90 = 10,378,049.80 : x
  2. Step 2: Convert to fraction form
    18,891,603.40/28,368,897.90 = 10,378,049.80/x
  3. Step 3: Cross multiply
    18,891,603.40x = 28,368,897.90 × 10,378,049.80
  4. Step 4: Simplify right side
    18,891,603.40x = 294,413,835,177,315.44
  5. Step 5: Solve for x
    x = 294,413,835,177,315.44/18,891,603.40
  6. Step 6: Final answer
    x = 15,584,375.18

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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.