Home / 20,727.09-28,607.99-13,171.94

Finding the Fourth Proportional to 20,727.09, 28,607.99 and 13,171.94

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Solution

The fourth proportional to 20,727.09, 28,607.99 and 13,171.94 is: 18,180.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,727.09 : 28,607.99 = 13,171.94 : x
  2. Step 2: Convert to fraction form
    20,727.09/28,607.99 = 13,171.94/x
  3. Step 3: Cross multiply
    20,727.09x = 28,607.99 × 13,171.94
  4. Step 4: Simplify right side
    20,727.09x = 376,822,727.80
  5. Step 5: Solve for x
    x = 376,822,727.80/20,727.09
  6. Step 6: Final answer
    x = 18,180.20

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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.