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Finding the Fourth Proportional to 20,283.50, 27,991.23 and 11,451.50

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Solution

The fourth proportional to 20,283.50, 27,991.23 and 11,451.50 is: 15,803.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,283.50 : 27,991.23 = 11,451.50 : x
  2. Step 2: Convert to fraction form
    20,283.50/27,991.23 = 11,451.50/x
  3. Step 3: Cross multiply
    20,283.50x = 27,991.23 × 11,451.50
  4. Step 4: Simplify right side
    20,283.50x = 320,541,570.35
  5. Step 5: Solve for x
    x = 320,541,570.35/20,283.50
  6. Step 6: Final answer
    x = 15,803.07

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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.