Home / 3,928.96-5,416.34-2,809.47

Finding the Fourth Proportional to 3,928.96, 5,416.34 and 2,809.47

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Solution

The fourth proportional to 3,928.96, 5,416.34 and 2,809.47 is: 3,873.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.96 : 5,416.34 = 2,809.47 : x
  2. Step 2: Convert to fraction form
    3,928.96/5,416.34 = 2,809.47/x
  3. Step 3: Cross multiply
    3,928.96x = 5,416.34 × 2,809.47
  4. Step 4: Simplify right side
    3,928.96x = 15,217,044.74
  5. Step 5: Solve for x
    x = 15,217,044.74/3,928.96
  6. Step 6: Final answer
    x = 3,873.05

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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.