Home / 20,938.16-28,893.48-12,874.88

Finding the Fourth Proportional to 20,938.16, 28,893.48 and 12,874.88

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Solution

The fourth proportional to 20,938.16, 28,893.48 and 12,874.88 is: 17,766.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.16 : 28,893.48 = 12,874.88 : x
  2. Step 2: Convert to fraction form
    20,938.16/28,893.48 = 12,874.88/x
  3. Step 3: Cross multiply
    20,938.16x = 28,893.48 × 12,874.88
  4. Step 4: Simplify right side
    20,938.16x = 372,000,087.78
  5. Step 5: Solve for x
    x = 372,000,087.78/20,938.16
  6. Step 6: Final answer
    x = 17,766.61

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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.