Home / 20,928.24-28,882.59-11,978.55

Finding the Fourth Proportional to 20,928.24, 28,882.59 and 11,978.55

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Solution

The fourth proportional to 20,928.24, 28,882.59 and 11,978.55 is: 16,531.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.24 : 28,882.59 = 11,978.55 : x
  2. Step 2: Convert to fraction form
    20,928.24/28,882.59 = 11,978.55/x
  3. Step 3: Cross multiply
    20,928.24x = 28,882.59 × 11,978.55
  4. Step 4: Simplify right side
    20,928.24x = 345,971,548.44
  5. Step 5: Solve for x
    x = 345,971,548.44/20,928.24
  6. Step 6: Final answer
    x = 16,531.33

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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.