Home / 20,827.45-28,742.64-11,874.86

Finding the Fourth Proportional to 20,827.45, 28,742.64 and 11,874.86

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Solution

The fourth proportional to 20,827.45, 28,742.64 and 11,874.86 is: 16,387.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,827.45 : 28,742.64 = 11,874.86 : x
  2. Step 2: Convert to fraction form
    20,827.45/28,742.64 = 11,874.86/x
  3. Step 3: Cross multiply
    20,827.45x = 28,742.64 × 11,874.86
  4. Step 4: Simplify right side
    20,827.45x = 341,314,826.03
  5. Step 5: Solve for x
    x = 341,314,826.03/20,827.45
  6. Step 6: Final answer
    x = 16,387.74

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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.