Home / 20,628.48-30,942.81-7,475.70

Finding the Fourth Proportional to 20,628.48, 30,942.81 and 7,475.70

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Solution

The fourth proportional to 20,628.48, 30,942.81 and 7,475.70 is: 11,213.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,628.48 : 30,942.81 = 7,475.70 : x
  2. Step 2: Convert to fraction form
    20,628.48/30,942.81 = 7,475.70/x
  3. Step 3: Cross multiply
    20,628.48x = 30,942.81 × 7,475.70
  4. Step 4: Simplify right side
    20,628.48x = 231,319,164.72
  5. Step 5: Solve for x
    x = 231,319,164.72/20,628.48
  6. Step 6: Final answer
    x = 11,213.58

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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.