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Finding the Fourth Proportional to 19,928,363.20, 29,892,544.80 and 19,760,401.60

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Solution

The fourth proportional to 19,928,363.20, 29,892,544.80 and 19,760,401.60 is: 29,640,602.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,928,363.20 : 29,892,544.80 = 19,760,401.60 : x
  2. Step 2: Convert to fraction form
    19,928,363.20/29,892,544.80 = 19,760,401.60/x
  3. Step 3: Cross multiply
    19,928,363.20x = 29,892,544.80 × 19,760,401.60
  4. Step 4: Simplify right side
    19,928,363.20x = 590,688,690,093,991.75
  5. Step 5: Solve for x
    x = 590,688,690,093,991.75/19,928,363.20
  6. Step 6: Final answer
    x = 29,640,602.40

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1.5x scale

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.