Home / 20,800.36-28,717.22-13,539.39

Finding the Fourth Proportional to 20,800.36, 28,717.22 and 13,539.39

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Solution

The fourth proportional to 20,800.36, 28,717.22 and 13,539.39 is: 18,692.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.36 : 28,717.22 = 13,539.39 : x
  2. Step 2: Convert to fraction form
    20,800.36/28,717.22 = 13,539.39/x
  3. Step 3: Cross multiply
    20,800.36x = 28,717.22 × 13,539.39
  4. Step 4: Simplify right side
    20,800.36x = 388,813,641.30
  5. Step 5: Solve for x
    x = 388,813,641.30/20,800.36
  6. Step 6: Final answer
    x = 18,692.64

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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.