Home / 20,936.98-31,447.14-12,519.77

Finding the Fourth Proportional to 20,936.98, 31,447.14 and 12,519.77

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Solution

The fourth proportional to 20,936.98, 31,447.14 and 12,519.77 is: 18,804.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.98 : 31,447.14 = 12,519.77 : x
  2. Step 2: Convert to fraction form
    20,936.98/31,447.14 = 12,519.77/x
  3. Step 3: Cross multiply
    20,936.98x = 31,447.14 × 12,519.77
  4. Step 4: Simplify right side
    20,936.98x = 393,710,755.77
  5. Step 5: Solve for x
    x = 393,710,755.77/20,936.98
  6. Step 6: Final answer
    x = 18,804.56

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1.5x scale

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.