Home / 20,880.24-28,812.96-11,928.48

Finding the Fourth Proportional to 20,880.24, 28,812.96 and 11,928.48

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Solution

The fourth proportional to 20,880.24, 28,812.96 and 11,928.48 is: 16,460.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,880.24 : 28,812.96 = 11,928.48 : x
  2. Step 2: Convert to fraction form
    20,880.24/28,812.96 = 11,928.48/x
  3. Step 3: Cross multiply
    20,880.24x = 28,812.96 × 11,928.48
  4. Step 4: Simplify right side
    20,880.24x = 343,694,817.10
  5. Step 5: Solve for x
    x = 343,694,817.10/20,880.24
  6. Step 6: Final answer
    x = 16,460.29

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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.