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Finding the Fourth Proportional to 18,954,646.60, 28,431,969.90 and 18,210,629.20

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Solution

The fourth proportional to 18,954,646.60, 28,431,969.90 and 18,210,629.20 is: 27,315,943.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,954,646.60 : 28,431,969.90 = 18,210,629.20 : x
  2. Step 2: Convert to fraction form
    18,954,646.60/28,431,969.90 = 18,210,629.20/x
  3. Step 3: Cross multiply
    18,954,646.60x = 28,431,969.90 × 18,210,629.20
  4. Step 4: Simplify right side
    18,954,646.60x = 517,764,061,274,461.06
  5. Step 5: Solve for x
    x = 517,764,061,274,461.06/18,954,646.60
  6. Step 6: Final answer
    x = 27,315,943.80

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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.