Home / 20,486.84-28,274.58-11,991.56

Finding the Fourth Proportional to 20,486.84, 28,274.58 and 11,991.56

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Solution

The fourth proportional to 20,486.84, 28,274.58 and 11,991.56 is: 16,549.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,486.84 : 28,274.58 = 11,991.56 : x
  2. Step 2: Convert to fraction form
    20,486.84/28,274.58 = 11,991.56/x
  3. Step 3: Cross multiply
    20,486.84x = 28,274.58 × 11,991.56
  4. Step 4: Simplify right side
    20,486.84x = 339,056,322.54
  5. Step 5: Solve for x
    x = 339,056,322.54/20,486.84
  6. Step 6: Final answer
    x = 16,549.96

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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.