Home / 13,801.86-20,696.55-3,938.79

Finding the Fourth Proportional to 13,801.86, 20,696.55 and 3,938.79

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Solution

The fourth proportional to 13,801.86, 20,696.55 and 3,938.79 is: 5,906.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,801.86 : 20,696.55 = 3,938.79 : x
  2. Step 2: Convert to fraction form
    13,801.86/20,696.55 = 3,938.79/x
  3. Step 3: Cross multiply
    13,801.86x = 20,696.55 × 3,938.79
  4. Step 4: Simplify right side
    13,801.86x = 81,519,364.17
  5. Step 5: Solve for x
    x = 81,519,364.17/13,801.86
  6. Step 6: Final answer
    x = 5,906.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.