Home / 20,936.91-28,885.77-12,976.23

Finding the Fourth Proportional to 20,936.91, 28,885.77 and 12,976.23

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Solution

The fourth proportional to 20,936.91, 28,885.77 and 12,976.23 is: 17,902.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.91 : 28,885.77 = 12,976.23 : x
  2. Step 2: Convert to fraction form
    20,936.91/28,885.77 = 12,976.23/x
  3. Step 3: Cross multiply
    20,936.91x = 28,885.77 × 12,976.23
  4. Step 4: Simplify right side
    20,936.91x = 374,828,395.25
  5. Step 5: Solve for x
    x = 374,828,395.25/20,936.91
  6. Step 6: Final answer
    x = 17,902.76

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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.