Home / 21,769.44-30,042.12-12,816.96

Finding the Fourth Proportional to 21,769.44, 30,042.12 and 12,816.96

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Solution

The fourth proportional to 21,769.44, 30,042.12 and 12,816.96 is: 17,687.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,769.44 : 30,042.12 = 12,816.96 : x
  2. Step 2: Convert to fraction form
    21,769.44/30,042.12 = 12,816.96/x
  3. Step 3: Cross multiply
    21,769.44x = 30,042.12 × 12,816.96
  4. Step 4: Simplify right side
    21,769.44x = 385,048,650.36
  5. Step 5: Solve for x
    x = 385,048,650.36/21,769.44
  6. Step 6: Final answer
    x = 17,687.58

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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.