Home / 3,935.56-5,907-1,989.12

Finding the Fourth Proportional to 3,935.56, 5,907 and 1,989.12

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Solution

The fourth proportional to 3,935.56, 5,907 and 1,989.12 is: 2,985.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,935.56 : 5,907 = 1,989.12 : x
  2. Step 2: Convert to fraction form
    3,935.56/5,907 = 1,989.12/x
  3. Step 3: Cross multiply
    3,935.56x = 5,907 × 1,989.12
  4. Step 4: Simplify right side
    3,935.56x = 11,749,731.84
  5. Step 5: Solve for x
    x = 11,749,731.84/3,935.56
  6. Step 6: Final answer
    x = 2,985.53

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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.