Home / 3,987.77-5,503.48-2,219.81

Finding the Fourth Proportional to 3,987.77, 5,503.48 and 2,219.81

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Solution

The fourth proportional to 3,987.77, 5,503.48 and 2,219.81 is: 3,063.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.77 : 5,503.48 = 2,219.81 : x
  2. Step 2: Convert to fraction form
    3,987.77/5,503.48 = 2,219.81/x
  3. Step 3: Cross multiply
    3,987.77x = 5,503.48 × 2,219.81
  4. Step 4: Simplify right side
    3,987.77x = 12,216,646.87
  5. Step 5: Solve for x
    x = 12,216,646.87/3,987.77
  6. Step 6: Final answer
    x = 3,063.53

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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.