Home / 20,933.60-28,880.19-11,976.31

Finding the Fourth Proportional to 20,933.60, 28,880.19 and 11,976.31

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Solution

The fourth proportional to 20,933.60, 28,880.19 and 11,976.31 is: 16,522.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,933.60 : 28,880.19 = 11,976.31 : x
  2. Step 2: Convert to fraction form
    20,933.60/28,880.19 = 11,976.31/x
  3. Step 3: Cross multiply
    20,933.60x = 28,880.19 × 11,976.31
  4. Step 4: Simplify right side
    20,933.60x = 345,878,036.10
  5. Step 5: Solve for x
    x = 345,878,036.10/20,933.60
  6. Step 6: Final answer
    x = 16,522.62

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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.