Home / 20,928.60-28,881.93-11,976.90

Finding the Fourth Proportional to 20,928.60, 28,881.93 and 11,976.90

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Solution

The fourth proportional to 20,928.60, 28,881.93 and 11,976.90 is: 16,528.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.60 : 28,881.93 = 11,976.90 : x
  2. Step 2: Convert to fraction form
    20,928.60/28,881.93 = 11,976.90/x
  3. Step 3: Cross multiply
    20,928.60x = 28,881.93 × 11,976.90
  4. Step 4: Simplify right side
    20,928.60x = 345,915,987.42
  5. Step 5: Solve for x
    x = 345,915,987.42/20,928.60
  6. Step 6: Final answer
    x = 16,528.39

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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.