Home / 20,644.58-28,489.56-11,213.12

Finding the Fourth Proportional to 20,644.58, 28,489.56 and 11,213.12

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Solution

The fourth proportional to 20,644.58, 28,489.56 and 11,213.12 is: 15,474.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,644.58 : 28,489.56 = 11,213.12 : x
  2. Step 2: Convert to fraction form
    20,644.58/28,489.56 = 11,213.12/x
  3. Step 3: Cross multiply
    20,644.58x = 28,489.56 × 11,213.12
  4. Step 4: Simplify right side
    20,644.58x = 319,456,855.03
  5. Step 5: Solve for x
    x = 319,456,855.03/20,644.58
  6. Step 6: Final answer
    x = 15,474.13

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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.