Home / 3,128.99-4,313.40-2,381.64

Finding the Fourth Proportional to 3,128.99, 4,313.40 and 2,381.64

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Solution

The fourth proportional to 3,128.99, 4,313.40 and 2,381.64 is: 3,283.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.99 : 4,313.40 = 2,381.64 : x
  2. Step 2: Convert to fraction form
    3,128.99/4,313.40 = 2,381.64/x
  3. Step 3: Cross multiply
    3,128.99x = 4,313.40 × 2,381.64
  4. Step 4: Simplify right side
    3,128.99x = 10,272,982.15
  5. Step 5: Solve for x
    x = 10,272,982.15/3,128.99
  6. Step 6: Final answer
    x = 3,283.17

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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.