Home / 7,187.56-10,781.21-3,921.45

Finding the Fourth Proportional to 7,187.56, 10,781.21 and 3,921.45

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Solution

The fourth proportional to 7,187.56, 10,781.21 and 3,921.45 is: 5,882.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,187.56 : 10,781.21 = 3,921.45 : x
  2. Step 2: Convert to fraction form
    7,187.56/10,781.21 = 3,921.45/x
  3. Step 3: Cross multiply
    7,187.56x = 10,781.21 × 3,921.45
  4. Step 4: Simplify right side
    7,187.56x = 42,277,902.44
  5. Step 5: Solve for x
    x = 42,277,902.44/7,187.56
  6. Step 6: Final answer
    x = 5,882.09

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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.