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Finding the Fourth Proportional to 20,659,993.40, 30,989,990.10 and 19,400,281.40

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Solution

The fourth proportional to 20,659,993.40, 30,989,990.10 and 19,400,281.40 is: 29,100,422.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,659,993.40 : 30,989,990.10 = 19,400,281.40 : x
  2. Step 2: Convert to fraction form
    20,659,993.40/30,989,990.10 = 19,400,281.40/x
  3. Step 3: Cross multiply
    20,659,993.40x = 30,989,990.10 × 19,400,281.40
  4. Step 4: Simplify right side
    20,659,993.40x = 601,214,528,523,214.12
  5. Step 5: Solve for x
    x = 601,214,528,523,214.12/20,659,993.40
  6. Step 6: Final answer
    x = 29,100,422.10

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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.