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Finding the Fourth Proportional to 12,456,087.90, 18,684,131.85 and 12,456,087.90

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Solution

The fourth proportional to 12,456,087.90, 18,684,131.85 and 12,456,087.90 is: 18,684,131.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,456,087.90 : 18,684,131.85 = 12,456,087.90 : x
  2. Step 2: Convert to fraction form
    12,456,087.90/18,684,131.85 = 12,456,087.90/x
  3. Step 3: Cross multiply
    12,456,087.90x = 18,684,131.85 × 12,456,087.90
  4. Step 4: Simplify right side
    12,456,087.90x = 232,731,188,658,789.62
  5. Step 5: Solve for x
    x = 232,731,188,658,789.62/12,456,087.90
  6. Step 6: Final answer
    x = 18,684,131.85

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Similar ratio
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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.