Home / 5,109.14-7,661.70-1,988.73

Finding the Fourth Proportional to 5,109.14, 7,661.70 and 1,988.73

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Solution

The fourth proportional to 5,109.14, 7,661.70 and 1,988.73 is: 2,982.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,109.14 : 7,661.70 = 1,988.73 : x
  2. Step 2: Convert to fraction form
    5,109.14/7,661.70 = 1,988.73/x
  3. Step 3: Cross multiply
    5,109.14x = 7,661.70 × 1,988.73
  4. Step 4: Simplify right side
    5,109.14x = 15,237,052.64
  5. Step 5: Solve for x
    x = 15,237,052.64/5,109.14
  6. Step 6: Final answer
    x = 2,982.31

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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.