Home / 3,988.36-5,503.28-2,219.92

Finding the Fourth Proportional to 3,988.36, 5,503.28 and 2,219.92

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Solution

The fourth proportional to 3,988.36, 5,503.28 and 2,219.92 is: 3,063.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.36 : 5,503.28 = 2,219.92 : x
  2. Step 2: Convert to fraction form
    3,988.36/5,503.28 = 2,219.92/x
  3. Step 3: Cross multiply
    3,988.36x = 5,503.28 × 2,219.92
  4. Step 4: Simplify right side
    3,988.36x = 12,216,841.34
  5. Step 5: Solve for x
    x = 12,216,841.34/3,988.36
  6. Step 6: Final answer
    x = 3,063.12

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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.