Home / 20,728.63-28,606.27-11,777.64

Finding the Fourth Proportional to 20,728.63, 28,606.27 and 11,777.64

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Solution

The fourth proportional to 20,728.63, 28,606.27 and 11,777.64 is: 16,253.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.63 : 28,606.27 = 11,777.64 : x
  2. Step 2: Convert to fraction form
    20,728.63/28,606.27 = 11,777.64/x
  3. Step 3: Cross multiply
    20,728.63x = 28,606.27 × 11,777.64
  4. Step 4: Simplify right side
    20,728.63x = 336,914,508.60
  5. Step 5: Solve for x
    x = 336,914,508.60/20,728.63
  6. Step 6: Final answer
    x = 16,253.59

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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.