Home / 3,421.72-4,721.91-1,929.64

Finding the Fourth Proportional to 3,421.72, 4,721.91 and 1,929.64

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Solution

The fourth proportional to 3,421.72, 4,721.91 and 1,929.64 is: 2,662.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.72 : 4,721.91 = 1,929.64 : x
  2. Step 2: Convert to fraction form
    3,421.72/4,721.91 = 1,929.64/x
  3. Step 3: Cross multiply
    3,421.72x = 4,721.91 × 1,929.64
  4. Step 4: Simplify right side
    3,421.72x = 9,111,576.23
  5. Step 5: Solve for x
    x = 9,111,576.23/3,421.72
  6. Step 6: Final answer
    x = 2,662.86

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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.