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Finding the Fourth Proportional to 18,954,647.60, 28,431,971.40 and 18,210,630.20

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Solution

The fourth proportional to 18,954,647.60, 28,431,971.40 and 18,210,630.20 is: 27,315,945.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,954,647.60 : 28,431,971.40 = 18,210,630.20 : x
  2. Step 2: Convert to fraction form
    18,954,647.60/28,431,971.40 = 18,210,630.20/x
  3. Step 3: Cross multiply
    18,954,647.60x = 28,431,971.40 × 18,210,630.20
  4. Step 4: Simplify right side
    18,954,647.60x = 517,764,117,022,376.25
  5. Step 5: Solve for x
    x = 517,764,117,022,376.25/18,954,647.60
  6. Step 6: Final answer
    x = 27,315,945.30

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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.