Home / 20,890.04-28,832.36-11,936.70

Finding the Fourth Proportional to 20,890.04, 28,832.36 and 11,936.70

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Solution

The fourth proportional to 20,890.04, 28,832.36 and 11,936.70 is: 16,474.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.04 : 28,832.36 = 11,936.70 : x
  2. Step 2: Convert to fraction form
    20,890.04/28,832.36 = 11,936.70/x
  3. Step 3: Cross multiply
    20,890.04x = 28,832.36 × 11,936.70
  4. Step 4: Simplify right side
    20,890.04x = 344,163,171.93
  5. Step 5: Solve for x
    x = 344,163,171.93/20,890.04
  6. Step 6: Final answer
    x = 16,474.99

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1.5x scale

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.