Home / 20,139.10-30,201.80-7,656.12

Finding the Fourth Proportional to 20,139.10, 30,201.80 and 7,656.12

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Solution

The fourth proportional to 20,139.10, 30,201.80 and 7,656.12 is: 11,481.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.10 : 30,201.80 = 7,656.12 : x
  2. Step 2: Convert to fraction form
    20,139.10/30,201.80 = 7,656.12/x
  3. Step 3: Cross multiply
    20,139.10x = 30,201.80 × 7,656.12
  4. Step 4: Simplify right side
    20,139.10x = 231,228,605.02
  5. Step 5: Solve for x
    x = 231,228,605.02/20,139.10
  6. Step 6: Final answer
    x = 11,481.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.