Home / 20,986,760.15-31,456,260.70-12,771,282.81

Finding the Fourth Proportional to 20,986,760.15, 31,456,260.70 and 12,771,282.81

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Solution

The fourth proportional to 20,986,760.15, 31,456,260.70 and 12,771,282.81 is: 19,142,392.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986,760.15 : 31,456,260.70 = 12,771,282.81 : x
  2. Step 2: Convert to fraction form
    20,986,760.15/31,456,260.70 = 12,771,282.81/x
  3. Step 3: Cross multiply
    20,986,760.15x = 31,456,260.70 × 12,771,282.81
  4. Step 4: Simplify right side
    20,986,760.15x = 401,736,801,453,879.88
  5. Step 5: Solve for x
    x = 401,736,801,453,879.88/20,986,760.15
  6. Step 6: Final answer
    x = 19,142,392.56

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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.