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Finding the Fourth Proportional to 12,289,940.30, 18,434,910.45 and 12,289,940.30

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Solution

The fourth proportional to 12,289,940.30, 18,434,910.45 and 12,289,940.30 is: 18,434,910.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,289,940.30 : 18,434,910.45 = 12,289,940.30 : x
  2. Step 2: Convert to fraction form
    12,289,940.30/18,434,910.45 = 12,289,940.30/x
  3. Step 3: Cross multiply
    12,289,940.30x = 18,434,910.45 × 12,289,940.30
  4. Step 4: Simplify right side
    12,289,940.30x = 226,563,948,866,346.12
  5. Step 5: Solve for x
    x = 226,563,948,866,346.12/12,289,940.30
  6. Step 6: Final answer
    x = 18,434,910.45

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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.