Home / 3,132.72-4,321.80-1,890

Finding the Fourth Proportional to 3,132.72, 4,321.80 and 1,890

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Solution

The fourth proportional to 3,132.72, 4,321.80 and 1,890 is: 2,607.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,132.72 : 4,321.80 = 1,890 : x
  2. Step 2: Convert to fraction form
    3,132.72/4,321.80 = 1,890/x
  3. Step 3: Cross multiply
    3,132.72x = 4,321.80 × 1,890
  4. Step 4: Simplify right side
    3,132.72x = 8,168,202
  5. Step 5: Solve for x
    x = 8,168,202/3,132.72
  6. Step 6: Final answer
    x = 2,607.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.