Home / 20,731.08-28,608.60-11,299.68

Finding the Fourth Proportional to 20,731.08, 28,608.60 and 11,299.68

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Solution

The fourth proportional to 20,731.08, 28,608.60 and 11,299.68 is: 15,593.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.08 : 28,608.60 = 11,299.68 : x
  2. Step 2: Convert to fraction form
    20,731.08/28,608.60 = 11,299.68/x
  3. Step 3: Cross multiply
    20,731.08x = 28,608.60 × 11,299.68
  4. Step 4: Simplify right side
    20,731.08x = 323,268,025.25
  5. Step 5: Solve for x
    x = 323,268,025.25/20,731.08
  6. Step 6: Final answer
    x = 15,593.40

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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.