Home / 3,988.16-5,503.60-2,219.80

Finding the Fourth Proportional to 3,988.16, 5,503.60 and 2,219.80

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Solution

The fourth proportional to 3,988.16, 5,503.60 and 2,219.80 is: 3,063.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.16 : 5,503.60 = 2,219.80 : x
  2. Step 2: Convert to fraction form
    3,988.16/5,503.60 = 2,219.80/x
  3. Step 3: Cross multiply
    3,988.16x = 5,503.60 × 2,219.80
  4. Step 4: Simplify right side
    3,988.16x = 12,216,891.28
  5. Step 5: Solve for x
    x = 12,216,891.28/3,988.16
  6. Step 6: Final answer
    x = 3,063.29

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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.