Home / 20,880-28,827.84-18,638.04

Finding the Fourth Proportional to 20,880, 28,827.84 and 18,638.04

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Solution

The fourth proportional to 20,880, 28,827.84 and 18,638.04 is: 25,732.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,880 : 28,827.84 = 18,638.04 : x
  2. Step 2: Convert to fraction form
    20,880/28,827.84 = 18,638.04/x
  3. Step 3: Cross multiply
    20,880x = 28,827.84 × 18,638.04
  4. Step 4: Simplify right side
    20,880x = 537,294,435.03
  5. Step 5: Solve for x
    x = 537,294,435.03/20,880
  6. Step 6: Final answer
    x = 25,732.49

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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.