Home / 20,790.82-28,689.12-12,293.27

Finding the Fourth Proportional to 20,790.82, 28,689.12 and 12,293.27

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Solution

The fourth proportional to 20,790.82, 28,689.12 and 12,293.27 is: 16,963.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.82 : 28,689.12 = 12,293.27 : x
  2. Step 2: Convert to fraction form
    20,790.82/28,689.12 = 12,293.27/x
  3. Step 3: Cross multiply
    20,790.82x = 28,689.12 × 12,293.27
  4. Step 4: Simplify right side
    20,790.82x = 352,682,954.78
  5. Step 5: Solve for x
    x = 352,682,954.78/20,790.82
  6. Step 6: Final answer
    x = 16,963.40

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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.