Home / 3,930.16-5,896.80-1,621.12

Finding the Fourth Proportional to 3,930.16, 5,896.80 and 1,621.12

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Solution

The fourth proportional to 3,930.16, 5,896.80 and 1,621.12 is: 2,432.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.16 : 5,896.80 = 1,621.12 : x
  2. Step 2: Convert to fraction form
    3,930.16/5,896.80 = 1,621.12/x
  3. Step 3: Cross multiply
    3,930.16x = 5,896.80 × 1,621.12
  4. Step 4: Simplify right side
    3,930.16x = 9,559,420.42
  5. Step 5: Solve for x
    x = 9,559,420.42/3,930.16
  6. Step 6: Final answer
    x = 2,432.32

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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.