Home / 18,931.50-28,405.31-7,846.25

Finding the Fourth Proportional to 18,931.50, 28,405.31 and 7,846.25

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Solution

The fourth proportional to 18,931.50, 28,405.31 and 7,846.25 is: 11,772.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,931.50 : 28,405.31 = 7,846.25 : x
  2. Step 2: Convert to fraction form
    18,931.50/28,405.31 = 7,846.25/x
  3. Step 3: Cross multiply
    18,931.50x = 28,405.31 × 7,846.25
  4. Step 4: Simplify right side
    18,931.50x = 222,874,982.33
  5. Step 5: Solve for x
    x = 222,874,982.33/18,931.50
  6. Step 6: Final answer
    x = 11,772.71

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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.