Home / 20,282.71-30,425.67-7,138.03

Finding the Fourth Proportional to 20,282.71, 30,425.67 and 7,138.03

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Solution

The fourth proportional to 20,282.71, 30,425.67 and 7,138.03 is: 10,707.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,282.71 : 30,425.67 = 7,138.03 : x
  2. Step 2: Convert to fraction form
    20,282.71/30,425.67 = 7,138.03/x
  3. Step 3: Cross multiply
    20,282.71x = 30,425.67 × 7,138.03
  4. Step 4: Simplify right side
    20,282.71x = 217,179,345.23
  5. Step 5: Solve for x
    x = 217,179,345.23/20,282.71
  6. Step 6: Final answer
    x = 10,707.61

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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.