Home / 3,929.72-5,422.47-3,135.02

Finding the Fourth Proportional to 3,929.72, 5,422.47 and 3,135.02

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Solution

The fourth proportional to 3,929.72, 5,422.47 and 3,135.02 is: 4,325.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.72 : 5,422.47 = 3,135.02 : x
  2. Step 2: Convert to fraction form
    3,929.72/5,422.47 = 3,135.02/x
  3. Step 3: Cross multiply
    3,929.72x = 5,422.47 × 3,135.02
  4. Step 4: Simplify right side
    3,929.72x = 16,999,551.90
  5. Step 5: Solve for x
    x = 16,999,551.90/3,929.72
  6. Step 6: Final answer
    x = 4,325.89

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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.