Home / 3,421.74-4,721.58-1,929.72

Finding the Fourth Proportional to 3,421.74, 4,721.58 and 1,929.72

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Solution

The fourth proportional to 3,421.74, 4,721.58 and 1,929.72 is: 2,662.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.74 : 4,721.58 = 1,929.72 : x
  2. Step 2: Convert to fraction form
    3,421.74/4,721.58 = 1,929.72/x
  3. Step 3: Cross multiply
    3,421.74x = 4,721.58 × 1,929.72
  4. Step 4: Simplify right side
    3,421.74x = 9,111,327.36
  5. Step 5: Solve for x
    x = 9,111,327.36/3,421.74
  6. Step 6: Final answer
    x = 2,662.78

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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.