Home / 20,936.61-28,884.33-11,979.30

Finding the Fourth Proportional to 20,936.61, 28,884.33 and 11,979.30

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Solution

The fourth proportional to 20,936.61, 28,884.33 and 11,979.30 is: 16,526.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.61 : 28,884.33 = 11,979.30 : x
  2. Step 2: Convert to fraction form
    20,936.61/28,884.33 = 11,979.30/x
  3. Step 3: Cross multiply
    20,936.61x = 28,884.33 × 11,979.30
  4. Step 4: Simplify right side
    20,936.61x = 346,014,054.37
  5. Step 5: Solve for x
    x = 346,014,054.37/20,936.61
  6. Step 6: Final answer
    x = 16,526.75

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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.