Home / 3,988.68-5,503.88-2,220.06

Finding the Fourth Proportional to 3,988.68, 5,503.88 and 2,220.06

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Solution

The fourth proportional to 3,988.68, 5,503.88 and 2,220.06 is: 3,063.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.68 : 5,503.88 = 2,220.06 : x
  2. Step 2: Convert to fraction form
    3,988.68/5,503.88 = 2,220.06/x
  3. Step 3: Cross multiply
    3,988.68x = 5,503.88 × 2,220.06
  4. Step 4: Simplify right side
    3,988.68x = 12,218,943.83
  5. Step 5: Solve for x
    x = 12,218,943.83/3,988.68
  6. Step 6: Final answer
    x = 3,063.41

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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.