Home / 21,303,491.80-31,936,575.30-12,787,216.60

Finding the Fourth Proportional to 21,303,491.80, 31,936,575.30 and 12,787,216.60

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Solution

The fourth proportional to 21,303,491.80, 31,936,575.30 and 12,787,216.60 is: 19,169,622.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,303,491.80 : 31,936,575.30 = 12,787,216.60 : x
  2. Step 2: Convert to fraction form
    21,303,491.80/31,936,575.30 = 12,787,216.60/x
  3. Step 3: Cross multiply
    21,303,491.80x = 31,936,575.30 × 12,787,216.60
  4. Step 4: Simplify right side
    21,303,491.80x = 408,379,905,823,310
  5. Step 5: Solve for x
    x = 408,379,905,823,310/21,303,491.80
  6. Step 6: Final answer
    x = 19,169,622.97

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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.