Home / 8,315.81-12,471.87-2,391.38

Finding the Fourth Proportional to 8,315.81, 12,471.87 and 2,391.38

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Solution

The fourth proportional to 8,315.81, 12,471.87 and 2,391.38 is: 3,586.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,315.81 : 12,471.87 = 2,391.38 : x
  2. Step 2: Convert to fraction form
    8,315.81/12,471.87 = 2,391.38/x
  3. Step 3: Cross multiply
    8,315.81x = 12,471.87 × 2,391.38
  4. Step 4: Simplify right side
    8,315.81x = 29,824,973.86
  5. Step 5: Solve for x
    x = 29,824,973.86/8,315.81
  6. Step 6: Final answer
    x = 3,586.54

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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.