Home / 20,485.39-28,272.53-11,534.64

Finding the Fourth Proportional to 20,485.39, 28,272.53 and 11,534.64

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Solution

The fourth proportional to 20,485.39, 28,272.53 and 11,534.64 is: 15,919.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.39 : 28,272.53 = 11,534.64 : x
  2. Step 2: Convert to fraction form
    20,485.39/28,272.53 = 11,534.64/x
  3. Step 3: Cross multiply
    20,485.39x = 28,272.53 × 11,534.64
  4. Step 4: Simplify right side
    20,485.39x = 326,113,455.44
  5. Step 5: Solve for x
    x = 326,113,455.44/20,485.39
  6. Step 6: Final answer
    x = 15,919.32

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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.