Home / 20,890,431,187.78-28,828,672,245.84-11,374,960,153.78

Finding the Fourth Proportional to 20,890,431,187.78, 28,828,672,245.84 and 11,374,960,153.78

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Solution

The fourth proportional to 20,890,431,187.78, 28,828,672,245.84 and 11,374,960,153.78 is: 15,697,378,150.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890,431,187.78 : 28,828,672,245.84 = 11,374,960,153.78 : x
  2. Step 2: Convert to fraction form
    20,890,431,187.78/28,828,672,245.84 = 11,374,960,153.78/x
  3. Step 3: Cross multiply
    20,890,431,187.78x = 28,828,672,245.84 × 11,374,960,153.78
  4. Step 4: Simplify right side
    20,890,431,187.78x = 327,924,998,082,813,427,712
  5. Step 5: Solve for x
    x = 327,924,998,082,813,427,712/20,890,431,187.78
  6. Step 6: Final answer
    x = 15,697,378,150.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.