Home / 3,900.12-5,381.44-2,328.36

Finding the Fourth Proportional to 3,900.12, 5,381.44 and 2,328.36

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Solution

The fourth proportional to 3,900.12, 5,381.44 and 2,328.36 is: 3,212.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.12 : 5,381.44 = 2,328.36 : x
  2. Step 2: Convert to fraction form
    3,900.12/5,381.44 = 2,328.36/x
  3. Step 3: Cross multiply
    3,900.12x = 5,381.44 × 2,328.36
  4. Step 4: Simplify right side
    3,900.12x = 12,529,929.64
  5. Step 5: Solve for x
    x = 12,529,929.64/3,900.12
  6. Step 6: Final answer
    x = 3,212.70

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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.