Home / 7,175.05-9,900.82-3,987.84

Finding the Fourth Proportional to 7,175.05, 9,900.82 and 3,987.84

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Solution

The fourth proportional to 7,175.05, 9,900.82 and 3,987.84 is: 5,502.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,175.05 : 9,900.82 = 3,987.84 : x
  2. Step 2: Convert to fraction form
    7,175.05/9,900.82 = 3,987.84/x
  3. Step 3: Cross multiply
    7,175.05x = 9,900.82 × 3,987.84
  4. Step 4: Simplify right side
    7,175.05x = 39,482,833.39
  5. Step 5: Solve for x
    x = 39,482,833.39/7,175.05
  6. Step 6: Final answer
    x = 5,502.80

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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.