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Finding the Fourth Proportional to 12,938,717.80, 19,408,076.70 and 12,686,775.40

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Solution

The fourth proportional to 12,938,717.80, 19,408,076.70 and 12,686,775.40 is: 19,030,163.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,938,717.80 : 19,408,076.70 = 12,686,775.40 : x
  2. Step 2: Convert to fraction form
    12,938,717.80/19,408,076.70 = 12,686,775.40/x
  3. Step 3: Cross multiply
    12,938,717.80x = 19,408,076.70 × 12,686,775.40
  4. Step 4: Simplify right side
    12,938,717.80x = 246,225,910,038,873.19
  5. Step 5: Solve for x
    x = 246,225,910,038,873.19/12,938,717.80
  6. Step 6: Final answer
    x = 19,030,163.10

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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.