Home / 20,734.72-28,629.60-13,671.04

Finding the Fourth Proportional to 20,734.72, 28,629.60 and 13,671.04

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Solution

The fourth proportional to 20,734.72, 28,629.60 and 13,671.04 is: 18,876.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,734.72 : 28,629.60 = 13,671.04 : x
  2. Step 2: Convert to fraction form
    20,734.72/28,629.60 = 13,671.04/x
  3. Step 3: Cross multiply
    20,734.72x = 28,629.60 × 13,671.04
  4. Step 4: Simplify right side
    20,734.72x = 391,396,406.78
  5. Step 5: Solve for x
    x = 391,396,406.78/20,734.72
  6. Step 6: Final answer
    x = 18,876.38

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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.