Home / 20,742.38-28,623.87-11,790.86

Finding the Fourth Proportional to 20,742.38, 28,623.87 and 11,790.86

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Solution

The fourth proportional to 20,742.38, 28,623.87 and 11,790.86 is: 16,271.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.38 : 28,623.87 = 11,790.86 : x
  2. Step 2: Convert to fraction form
    20,742.38/28,623.87 = 11,790.86/x
  3. Step 3: Cross multiply
    20,742.38x = 28,623.87 × 11,790.86
  4. Step 4: Simplify right side
    20,742.38x = 337,500,043.83
  5. Step 5: Solve for x
    x = 337,500,043.83/20,742.38
  6. Step 6: Final answer
    x = 16,271.04

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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.