Home / 7,087.80-10,631.88-3,390.42

Finding the Fourth Proportional to 7,087.80, 10,631.88 and 3,390.42

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Solution

The fourth proportional to 7,087.80, 10,631.88 and 3,390.42 is: 5,085.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,087.80 : 10,631.88 = 3,390.42 : x
  2. Step 2: Convert to fraction form
    7,087.80/10,631.88 = 3,390.42/x
  3. Step 3: Cross multiply
    7,087.80x = 10,631.88 × 3,390.42
  4. Step 4: Simplify right side
    7,087.80x = 36,046,521.64
  5. Step 5: Solve for x
    x = 36,046,521.64/7,087.80
  6. Step 6: Final answer
    x = 5,085.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.