Home / 20,778,556.40-28,673,041.42-11,956,583.79

Finding the Fourth Proportional to 20,778,556.40, 28,673,041.42 and 11,956,583.79

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Solution

The fourth proportional to 20,778,556.40, 28,673,041.42 and 11,956,583.79 is: 16,499,299.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778,556.40 : 28,673,041.42 = 11,956,583.79 : x
  2. Step 2: Convert to fraction form
    20,778,556.40/28,673,041.42 = 11,956,583.79/x
  3. Step 3: Cross multiply
    20,778,556.40x = 28,673,041.42 × 11,956,583.79
  4. Step 4: Simplify right side
    20,778,556.40x = 342,831,622,353,944.62
  5. Step 5: Solve for x
    x = 342,831,622,353,944.62/20,778,556.40
  6. Step 6: Final answer
    x = 16,499,299.36

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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.