Home / 20,880.66-28,782.60-15,824.64

Finding the Fourth Proportional to 20,880.66, 28,782.60 and 15,824.64

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Solution

The fourth proportional to 20,880.66, 28,782.60 and 15,824.64 is: 21,813.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,880.66 : 28,782.60 = 15,824.64 : x
  2. Step 2: Convert to fraction form
    20,880.66/28,782.60 = 15,824.64/x
  3. Step 3: Cross multiply
    20,880.66x = 28,782.60 × 15,824.64
  4. Step 4: Simplify right side
    20,880.66x = 455,474,283.26
  5. Step 5: Solve for x
    x = 455,474,283.26/20,880.66
  6. Step 6: Final answer
    x = 21,813.21

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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.