Home / 5,286.18-7,929.33-1,390.98

Finding the Fourth Proportional to 5,286.18, 7,929.33 and 1,390.98

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Solution

The fourth proportional to 5,286.18, 7,929.33 and 1,390.98 is: 2,086.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,286.18 : 7,929.33 = 1,390.98 : x
  2. Step 2: Convert to fraction form
    5,286.18/7,929.33 = 1,390.98/x
  3. Step 3: Cross multiply
    5,286.18x = 7,929.33 × 1,390.98
  4. Step 4: Simplify right side
    5,286.18x = 11,029,539.44
  5. Step 5: Solve for x
    x = 11,029,539.44/5,286.18
  6. Step 6: Final answer
    x = 2,086.49

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1.5x scale

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.