Home / 20,785,260,619.30-31,177,890,928.95-12,795,789,201.70

Finding the Fourth Proportional to 20,785,260,619.30, 31,177,890,928.95 and 12,795,789,201.70

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Solution

The fourth proportional to 20,785,260,619.30, 31,177,890,928.95 and 12,795,789,201.70 is: 19,193,683,802.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785,260,619.30 : 31,177,890,928.95 = 12,795,789,201.70 : x
  2. Step 2: Convert to fraction form
    20,785,260,619.30/31,177,890,928.95 = 12,795,789,201.70/x
  3. Step 3: Cross multiply
    20,785,260,619.30x = 31,177,890,928.95 × 12,795,789,201.70
  4. Step 4: Simplify right side
    20,785,260,619.30x = 398,945,720,080,438,853,632
  5. Step 5: Solve for x
    x = 398,945,720,080,438,853,632/20,785,260,619.30
  6. Step 6: Final answer
    x = 19,193,683,802.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.