Home / 20,486.96-28,272.16-12,107.60

Finding the Fourth Proportional to 20,486.96, 28,272.16 and 12,107.60

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Solution

The fourth proportional to 20,486.96, 28,272.16 and 12,107.60 is: 16,708.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,486.96 : 28,272.16 = 12,107.60 : x
  2. Step 2: Convert to fraction form
    20,486.96/28,272.16 = 12,107.60/x
  3. Step 3: Cross multiply
    20,486.96x = 28,272.16 × 12,107.60
  4. Step 4: Simplify right side
    20,486.96x = 342,308,004.42
  5. Step 5: Solve for x
    x = 342,308,004.42/20,486.96
  6. Step 6: Final answer
    x = 16,708.58

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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.