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Finding the Fourth Proportional to 13,778,812.80, 20,619,230.40 and 12,001,219.20

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Solution

The fourth proportional to 13,778,812.80, 20,619,230.40 and 12,001,219.20 is: 17,959,160.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,778,812.80 : 20,619,230.40 = 12,001,219.20 : x
  2. Step 2: Convert to fraction form
    13,778,812.80/20,619,230.40 = 12,001,219.20/x
  3. Step 3: Cross multiply
    13,778,812.80x = 20,619,230.40 × 12,001,219.20
  4. Step 4: Simplify right side
    13,778,812.80x = 247,455,903,765,703.66
  5. Step 5: Solve for x
    x = 247,455,903,765,703.66/13,778,812.80
  6. Step 6: Final answer
    x = 17,959,160.01

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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.