Home / 20,951.08-28,911.26-11,519.64

Finding the Fourth Proportional to 20,951.08, 28,911.26 and 11,519.64

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Solution

The fourth proportional to 20,951.08, 28,911.26 and 11,519.64 is: 15,896.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,951.08 : 28,911.26 = 11,519.64 : x
  2. Step 2: Convert to fraction form
    20,951.08/28,911.26 = 11,519.64/x
  3. Step 3: Cross multiply
    20,951.08x = 28,911.26 × 11,519.64
  4. Step 4: Simplify right side
    20,951.08x = 333,047,307.15
  5. Step 5: Solve for x
    x = 333,047,307.15/20,951.08
  6. Step 6: Final answer
    x = 15,896.43

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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.