Home / 3,421.51-4,721.70-1,929.49

Finding the Fourth Proportional to 3,421.51, 4,721.70 and 1,929.49

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Solution

The fourth proportional to 3,421.51, 4,721.70 and 1,929.49 is: 2,662.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.51 : 4,721.70 = 1,929.49 : x
  2. Step 2: Convert to fraction form
    3,421.51/4,721.70 = 1,929.49/x
  3. Step 3: Cross multiply
    3,421.51x = 4,721.70 × 1,929.49
  4. Step 4: Simplify right side
    3,421.51x = 9,110,472.93
  5. Step 5: Solve for x
    x = 9,110,472.93/3,421.51
  6. Step 6: Final answer
    x = 2,662.71

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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.