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Finding the Fourth Proportional to 21,978,137.80, 32,967,206.70 and 14,325,387.40

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Solution

The fourth proportional to 21,978,137.80, 32,967,206.70 and 14,325,387.40 is: 21,488,081.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,978,137.80 : 32,967,206.70 = 14,325,387.40 : x
  2. Step 2: Convert to fraction form
    21,978,137.80/32,967,206.70 = 14,325,387.40/x
  3. Step 3: Cross multiply
    21,978,137.80x = 32,967,206.70 × 14,325,387.40
  4. Step 4: Simplify right side
    21,978,137.80x = 472,268,007,473,375.56
  5. Step 5: Solve for x
    x = 472,268,007,473,375.56/21,978,137.80
  6. Step 6: Final answer
    x = 21,488,081.10

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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.