Home / 20,890,431,172.56-28,828,672,224.75-11,374,960,138.50

Finding the Fourth Proportional to 20,890,431,172.56, 28,828,672,224.75 and 11,374,960,138.50

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Solution

The fourth proportional to 20,890,431,172.56, 28,828,672,224.75 and 11,374,960,138.50 is: 15,697,378,129.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890,431,172.56 : 28,828,672,224.75 = 11,374,960,138.50 : x
  2. Step 2: Convert to fraction form
    20,890,431,172.56/28,828,672,224.75 = 11,374,960,138.50/x
  3. Step 3: Cross multiply
    20,890,431,172.56x = 28,828,672,224.75 × 11,374,960,138.50
  4. Step 4: Simplify right side
    20,890,431,172.56x = 327,924,997,402,413,367,296
  5. Step 5: Solve for x
    x = 327,924,997,402,413,367,296/20,890,431,172.56
  6. Step 6: Final answer
    x = 15,697,378,129.43

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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.