Home / 20,539.52-28,351.80-12,156

Finding the Fourth Proportional to 20,539.52, 28,351.80 and 12,156

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Solution

The fourth proportional to 20,539.52, 28,351.80 and 12,156 is: 16,779.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,539.52 : 28,351.80 = 12,156 : x
  2. Step 2: Convert to fraction form
    20,539.52/28,351.80 = 12,156/x
  3. Step 3: Cross multiply
    20,539.52x = 28,351.80 × 12,156
  4. Step 4: Simplify right side
    20,539.52x = 344,644,480.80
  5. Step 5: Solve for x
    x = 344,644,480.80/20,539.52
  6. Step 6: Final answer
    x = 16,779.58

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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.