Home / 3,247.90-4,479.81-3,139.41

Finding the Fourth Proportional to 3,247.90, 4,479.81 and 3,139.41

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Solution

The fourth proportional to 3,247.90, 4,479.81 and 3,139.41 is: 4,330.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,247.90 : 4,479.81 = 3,139.41 : x
  2. Step 2: Convert to fraction form
    3,247.90/4,479.81 = 3,139.41/x
  3. Step 3: Cross multiply
    3,247.90x = 4,479.81 × 3,139.41
  4. Step 4: Simplify right side
    3,247.90x = 14,063,940.14
  5. Step 5: Solve for x
    x = 14,063,940.14/3,247.90
  6. Step 6: Final answer
    x = 4,330.17

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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.