Home / 20,400.22-28,152.60-11,447.20

Finding the Fourth Proportional to 20,400.22, 28,152.60 and 11,447.20

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Solution

The fourth proportional to 20,400.22, 28,152.60 and 11,447.20 is: 15,797.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.22 : 28,152.60 = 11,447.20 : x
  2. Step 2: Convert to fraction form
    20,400.22/28,152.60 = 11,447.20/x
  3. Step 3: Cross multiply
    20,400.22x = 28,152.60 × 11,447.20
  4. Step 4: Simplify right side
    20,400.22x = 322,268,442.72
  5. Step 5: Solve for x
    x = 322,268,442.72/20,400.22
  6. Step 6: Final answer
    x = 15,797.30

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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.