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Finding the Fourth Proportional to 18,869,356.60, 28,304,034.90 and 18,554,428.60

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Solution

The fourth proportional to 18,869,356.60, 28,304,034.90 and 18,554,428.60 is: 27,831,642.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,869,356.60 : 28,304,034.90 = 18,554,428.60 : x
  2. Step 2: Convert to fraction form
    18,869,356.60/28,304,034.90 = 18,554,428.60/x
  3. Step 3: Cross multiply
    18,869,356.60x = 28,304,034.90 × 18,554,428.60
  4. Step 4: Simplify right side
    18,869,356.60x = 525,165,194,643,958.12
  5. Step 5: Solve for x
    x = 525,165,194,643,958.12/18,869,356.60
  6. Step 6: Final answer
    x = 27,831,642.90

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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.