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Finding the Fourth Proportional to 12,954,311.80, 19,431,467.70 and 3,978,849.40

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Solution

The fourth proportional to 12,954,311.80, 19,431,467.70 and 3,978,849.40 is: 5,968,274.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,954,311.80 : 19,431,467.70 = 3,978,849.40 : x
  2. Step 2: Convert to fraction form
    12,954,311.80/19,431,467.70 = 3,978,849.40/x
  3. Step 3: Cross multiply
    12,954,311.80x = 19,431,467.70 × 3,978,849.40
  4. Step 4: Simplify right side
    12,954,311.80x = 77,314,883,599,264.38
  5. Step 5: Solve for x
    x = 77,314,883,599,264.38/12,954,311.80
  6. Step 6: Final answer
    x = 5,968,274.10

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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.