Home / 3,421.21-4,721.37-1,929.17

Finding the Fourth Proportional to 3,421.21, 4,721.37 and 1,929.17

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Solution

The fourth proportional to 3,421.21, 4,721.37 and 1,929.17 is: 2,662.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.21 : 4,721.37 = 1,929.17 : x
  2. Step 2: Convert to fraction form
    3,421.21/4,721.37 = 1,929.17/x
  3. Step 3: Cross multiply
    3,421.21x = 4,721.37 × 1,929.17
  4. Step 4: Simplify right side
    3,421.21x = 9,108,315.72
  5. Step 5: Solve for x
    x = 9,108,315.72/3,421.21
  6. Step 6: Final answer
    x = 2,662.31

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1.5x scale

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.