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Finding the Fourth Proportional to 18,993,868.73, 28,490,814.17 and 13,339,336.49

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Solution

The fourth proportional to 18,993,868.73, 28,490,814.17 and 13,339,336.49 is: 20,009,012.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,993,868.73 : 28,490,814.17 = 13,339,336.49 : x
  2. Step 2: Convert to fraction form
    18,993,868.73/28,490,814.17 = 13,339,336.49/x
  3. Step 3: Cross multiply
    18,993,868.73x = 28,490,814.17 × 13,339,336.49
  4. Step 4: Simplify right side
    18,993,868.73x = 380,048,556,878,539.25
  5. Step 5: Solve for x
    x = 380,048,556,878,539.25/18,993,868.73
  6. Step 6: Final answer
    x = 20,009,012.51

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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.