Home / 20,729.72-28,610.32-11,780.03

Finding the Fourth Proportional to 20,729.72, 28,610.32 and 11,780.03

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Solution

The fourth proportional to 20,729.72, 28,610.32 and 11,780.03 is: 16,258.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.72 : 28,610.32 = 11,780.03 : x
  2. Step 2: Convert to fraction form
    20,729.72/28,610.32 = 11,780.03/x
  3. Step 3: Cross multiply
    20,729.72x = 28,610.32 × 11,780.03
  4. Step 4: Simplify right side
    20,729.72x = 337,030,427.91
  5. Step 5: Solve for x
    x = 337,030,427.91/20,729.72
  6. Step 6: Final answer
    x = 16,258.32

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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.