Home / 20,928.04-28,880.66-11,496.60

Finding the Fourth Proportional to 20,928.04, 28,880.66 and 11,496.60

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Solution

The fourth proportional to 20,928.04, 28,880.66 and 11,496.60 is: 15,865.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.04 : 28,880.66 = 11,496.60 : x
  2. Step 2: Convert to fraction form
    20,928.04/28,880.66 = 11,496.60/x
  3. Step 3: Cross multiply
    20,928.04x = 28,880.66 × 11,496.60
  4. Step 4: Simplify right side
    20,928.04x = 332,029,395.76
  5. Step 5: Solve for x
    x = 332,029,395.76/20,928.04
  6. Step 6: Final answer
    x = 15,865.29

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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.