Home / 3,911.48-5,380.34-3,430.58

Finding the Fourth Proportional to 3,911.48, 5,380.34 and 3,430.58

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Solution

The fourth proportional to 3,911.48, 5,380.34 and 3,430.58 is: 4,718.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.48 : 5,380.34 = 3,430.58 : x
  2. Step 2: Convert to fraction form
    3,911.48/5,380.34 = 3,430.58/x
  3. Step 3: Cross multiply
    3,911.48x = 5,380.34 × 3,430.58
  4. Step 4: Simplify right side
    3,911.48x = 18,457,662.04
  5. Step 5: Solve for x
    x = 18,457,662.04/3,911.48
  6. Step 6: Final answer
    x = 4,718.84

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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.