Home / 3,988.80-5,504.56-2,415.76

Finding the Fourth Proportional to 3,988.80, 5,504.56 and 2,415.76

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Solution

The fourth proportional to 3,988.80, 5,504.56 and 2,415.76 is: 3,333.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.80 : 5,504.56 = 2,415.76 : x
  2. Step 2: Convert to fraction form
    3,988.80/5,504.56 = 2,415.76/x
  3. Step 3: Cross multiply
    3,988.80x = 5,504.56 × 2,415.76
  4. Step 4: Simplify right side
    3,988.80x = 13,297,695.87
  5. Step 5: Solve for x
    x = 13,297,695.87/3,988.80
  6. Step 6: Final answer
    x = 3,333.76

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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.