Home / 20,576.10-28,396-12,078.60

Finding the Fourth Proportional to 20,576.10, 28,396 and 12,078.60

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Solution

The fourth proportional to 20,576.10, 28,396 and 12,078.60 is: 16,669.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,576.10 : 28,396 = 12,078.60 : x
  2. Step 2: Convert to fraction form
    20,576.10/28,396 = 12,078.60/x
  3. Step 3: Cross multiply
    20,576.10x = 28,396 × 12,078.60
  4. Step 4: Simplify right side
    20,576.10x = 342,983,925.60
  5. Step 5: Solve for x
    x = 342,983,925.60/20,576.10
  6. Step 6: Final answer
    x = 16,669.04

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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.