Home / 3,929.72-5,421.40-2,513.03

Finding the Fourth Proportional to 3,929.72, 5,421.40 and 2,513.03

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Solution

The fourth proportional to 3,929.72, 5,421.40 and 2,513.03 is: 3,466.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.72 : 5,421.40 = 2,513.03 : x
  2. Step 2: Convert to fraction form
    3,929.72/5,421.40 = 2,513.03/x
  3. Step 3: Cross multiply
    3,929.72x = 5,421.40 × 2,513.03
  4. Step 4: Simplify right side
    3,929.72x = 13,624,107.45
  5. Step 5: Solve for x
    x = 13,624,107.45/3,929.72
  6. Step 6: Final answer
    x = 3,466.95

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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.