Home / 3,988.85-5,503.95-2,220.41

Finding the Fourth Proportional to 3,988.85, 5,503.95 and 2,220.41

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Solution

The fourth proportional to 3,988.85, 5,503.95 and 2,220.41 is: 3,063.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.85 : 5,503.95 = 2,220.41 : x
  2. Step 2: Convert to fraction form
    3,988.85/5,503.95 = 2,220.41/x
  3. Step 3: Cross multiply
    3,988.85x = 5,503.95 × 2,220.41
  4. Step 4: Simplify right side
    3,988.85x = 12,221,039.38
  5. Step 5: Solve for x
    x = 12,221,039.38/3,988.85
  6. Step 6: Final answer
    x = 3,063.80

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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.