Home / 20,796,289.86-28,696,379.40-11,978,609

Finding the Fourth Proportional to 20,796,289.86, 28,696,379.40 and 11,978,609

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Solution

The fourth proportional to 20,796,289.86, 28,696,379.40 and 11,978,609 is: 16,529,040.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,796,289.86 : 28,696,379.40 = 11,978,609 : x
  2. Step 2: Convert to fraction form
    20,796,289.86/28,696,379.40 = 11,978,609/x
  3. Step 3: Cross multiply
    20,796,289.86x = 28,696,379.40 × 11,978,609
  4. Step 4: Simplify right side
    20,796,289.86x = 343,742,708,548,254.56
  5. Step 5: Solve for x
    x = 343,742,708,548,254.56/20,796,289.86
  6. Step 6: Final answer
    x = 16,529,040.08

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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.