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Finding the Fourth Proportional to 19,318,696.80, 28,978,045.20 and 19,035,261.60

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Solution

The fourth proportional to 19,318,696.80, 28,978,045.20 and 19,035,261.60 is: 28,552,892.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,318,696.80 : 28,978,045.20 = 19,035,261.60 : x
  2. Step 2: Convert to fraction form
    19,318,696.80/28,978,045.20 = 19,035,261.60/x
  3. Step 3: Cross multiply
    19,318,696.80x = 28,978,045.20 × 19,035,261.60
  4. Step 4: Simplify right side
    19,318,696.80x = 551,604,671,038,624.38
  5. Step 5: Solve for x
    x = 551,604,671,038,624.38/19,318,696.80
  6. Step 6: Final answer
    x = 28,552,892.40

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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.