Home / 3,974.40-5,478.36-3,133.80

Finding the Fourth Proportional to 3,974.40, 5,478.36 and 3,133.80

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Solution

The fourth proportional to 3,974.40, 5,478.36 and 3,133.80 is: 4,319.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,974.40 : 5,478.36 = 3,133.80 : x
  2. Step 2: Convert to fraction form
    3,974.40/5,478.36 = 3,133.80/x
  3. Step 3: Cross multiply
    3,974.40x = 5,478.36 × 3,133.80
  4. Step 4: Simplify right side
    3,974.40x = 17,168,084.57
  5. Step 5: Solve for x
    x = 17,168,084.57/3,974.40
  6. Step 6: Final answer
    x = 4,319.67

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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.