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Finding the Fourth Proportional to 12,431,746.20, 18,647,619.30 and 12,431,746.20

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Solution

The fourth proportional to 12,431,746.20, 18,647,619.30 and 12,431,746.20 is: 18,647,619.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,431,746.20 : 18,647,619.30 = 12,431,746.20 : x
  2. Step 2: Convert to fraction form
    12,431,746.20/18,647,619.30 = 12,431,746.20/x
  3. Step 3: Cross multiply
    12,431,746.20x = 18,647,619.30 × 12,431,746.20
  4. Step 4: Simplify right side
    12,431,746.20x = 231,822,470,371,821.66
  5. Step 5: Solve for x
    x = 231,822,470,371,821.66/12,431,746.20
  6. Step 6: Final answer
    x = 18,647,619.30

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1.5x scale

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.