Home / 20,889.98-28,811.88-12,936.62

Finding the Fourth Proportional to 20,889.98, 28,811.88 and 12,936.62

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Solution

The fourth proportional to 20,889.98, 28,811.88 and 12,936.62 is: 17,842.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.98 : 28,811.88 = 12,936.62 : x
  2. Step 2: Convert to fraction form
    20,889.98/28,811.88 = 12,936.62/x
  3. Step 3: Cross multiply
    20,889.98x = 28,811.88 × 12,936.62
  4. Step 4: Simplify right side
    20,889.98x = 372,728,343.05
  5. Step 5: Solve for x
    x = 372,728,343.05/20,889.98
  6. Step 6: Final answer
    x = 17,842.45

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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.