Home / 20,878.28-28,811.58-11,446.64

Finding the Fourth Proportional to 20,878.28, 28,811.58 and 11,446.64

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Solution

The fourth proportional to 20,878.28, 28,811.58 and 11,446.64 is: 15,796.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.28 : 28,811.58 = 11,446.64 : x
  2. Step 2: Convert to fraction form
    20,878.28/28,811.58 = 11,446.64/x
  3. Step 3: Cross multiply
    20,878.28x = 28,811.58 × 11,446.64
  4. Step 4: Simplify right side
    20,878.28x = 329,795,784.09
  5. Step 5: Solve for x
    x = 329,795,784.09/20,878.28
  6. Step 6: Final answer
    x = 15,796.12

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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.