Home / 5,487.12-8,231.70-1,790.40

Finding the Fourth Proportional to 5,487.12, 8,231.70 and 1,790.40

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Solution

The fourth proportional to 5,487.12, 8,231.70 and 1,790.40 is: 2,685.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,487.12 : 8,231.70 = 1,790.40 : x
  2. Step 2: Convert to fraction form
    5,487.12/8,231.70 = 1,790.40/x
  3. Step 3: Cross multiply
    5,487.12x = 8,231.70 × 1,790.40
  4. Step 4: Simplify right side
    5,487.12x = 14,738,035.68
  5. Step 5: Solve for x
    x = 14,738,035.68/5,487.12
  6. Step 6: Final answer
    x = 2,685.93

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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.