Home / 3,988.86-5,503.98-2,220.42

Finding the Fourth Proportional to 3,988.86, 5,503.98 and 2,220.42

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Solution

The fourth proportional to 3,988.86, 5,503.98 and 2,220.42 is: 3,063.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.86 : 5,503.98 = 2,220.42 : x
  2. Step 2: Convert to fraction form
    3,988.86/5,503.98 = 2,220.42/x
  3. Step 3: Cross multiply
    3,988.86x = 5,503.98 × 2,220.42
  4. Step 4: Simplify right side
    3,988.86x = 12,221,147.27
  5. Step 5: Solve for x
    x = 12,221,147.27/3,988.86
  6. Step 6: Final answer
    x = 3,063.82

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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.