Home / 20,430.45-30,628.67-7,947.54

Finding the Fourth Proportional to 20,430.45, 30,628.67 and 7,947.54

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Solution

The fourth proportional to 20,430.45, 30,628.67 and 7,947.54 is: 11,914.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.45 : 30,628.67 = 7,947.54 : x
  2. Step 2: Convert to fraction form
    20,430.45/30,628.67 = 7,947.54/x
  3. Step 3: Cross multiply
    20,430.45x = 30,628.67 × 7,947.54
  4. Step 4: Simplify right side
    20,430.45x = 243,422,540.23
  5. Step 5: Solve for x
    x = 243,422,540.23/20,430.45
  6. Step 6: Final answer
    x = 11,914.69

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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.