Home / 20,649,863.72-28,500,378.81-11,952,831.62

Finding the Fourth Proportional to 20,649,863.72, 28,500,378.81 and 11,952,831.62

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Solution

The fourth proportional to 20,649,863.72, 28,500,378.81 and 11,952,831.62 is: 16,496,972.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,649,863.72 : 28,500,378.81 = 11,952,831.62 : x
  2. Step 2: Convert to fraction form
    20,649,863.72/28,500,378.81 = 11,952,831.62/x
  3. Step 3: Cross multiply
    20,649,863.72x = 28,500,378.81 × 11,952,831.62
  4. Step 4: Simplify right side
    20,649,863.72x = 340,660,229,022,145.94
  5. Step 5: Solve for x
    x = 340,660,229,022,145.94/20,649,863.72
  6. Step 6: Final answer
    x = 16,496,972.26

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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.