Home / 20,732,379-28,621,040.94-12,894,417.78

Finding the Fourth Proportional to 20,732,379, 28,621,040.94 and 12,894,417.78

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Solution

The fourth proportional to 20,732,379, 28,621,040.94 and 12,894,417.78 is: 17,800,738.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,732,379 : 28,621,040.94 = 12,894,417.78 : x
  2. Step 2: Convert to fraction form
    20,732,379/28,621,040.94 = 12,894,417.78/x
  3. Step 3: Cross multiply
    20,732,379x = 28,621,040.94 × 12,894,417.78
  4. Step 4: Simplify right side
    20,732,379x = 369,051,659,178,843.94
  5. Step 5: Solve for x
    x = 369,051,659,178,843.94/20,732,379
  6. Step 6: Final answer
    x = 17,800,738.60

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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.