Home / 3,918.12-5,405.91-2,521.68

Finding the Fourth Proportional to 3,918.12, 5,405.91 and 2,521.68

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Solution

The fourth proportional to 3,918.12, 5,405.91 and 2,521.68 is: 3,479.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.12 : 5,405.91 = 2,521.68 : x
  2. Step 2: Convert to fraction form
    3,918.12/5,405.91 = 2,521.68/x
  3. Step 3: Cross multiply
    3,918.12x = 5,405.91 × 2,521.68
  4. Step 4: Simplify right side
    3,918.12x = 13,631,975.13
  5. Step 5: Solve for x
    x = 13,631,975.13/3,918.12
  6. Step 6: Final answer
    x = 3,479.21

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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.