Home / 3,988.18-5,503.86-2,219.68

Finding the Fourth Proportional to 3,988.18, 5,503.86 and 2,219.68

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Solution

The fourth proportional to 3,988.18, 5,503.86 and 2,219.68 is: 3,063.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.18 : 5,503.86 = 2,219.68 : x
  2. Step 2: Convert to fraction form
    3,988.18/5,503.86 = 2,219.68/x
  3. Step 3: Cross multiply
    3,988.18x = 5,503.86 × 2,219.68
  4. Step 4: Simplify right side
    3,988.18x = 12,216,807.96
  5. Step 5: Solve for x
    x = 12,216,807.96/3,988.18
  6. Step 6: Final answer
    x = 3,063.25

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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.