Home / 20,986,761.66-31,456,262.94-12,771,284.31

Finding the Fourth Proportional to 20,986,761.66, 31,456,262.94 and 12,771,284.31

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Solution

The fourth proportional to 20,986,761.66, 31,456,262.94 and 12,771,284.31 is: 19,142,394.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986,761.66 : 31,456,262.94 = 12,771,284.31 : x
  2. Step 2: Convert to fraction form
    20,986,761.66/31,456,262.94 = 12,771,284.31/x
  3. Step 3: Cross multiply
    20,986,761.66x = 31,456,262.94 × 12,771,284.31
  4. Step 4: Simplify right side
    20,986,761.66x = 401,736,877,336,856.50
  5. Step 5: Solve for x
    x = 401,736,877,336,856.50/20,986,761.66
  6. Step 6: Final answer
    x = 19,142,394.80

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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.