Home / 15,321.55-21,141.43-8,605.89

Finding the Fourth Proportional to 15,321.55, 21,141.43 and 8,605.89

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Solution

The fourth proportional to 15,321.55, 21,141.43 and 8,605.89 is: 11,874.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,321.55 : 21,141.43 = 8,605.89 : x
  2. Step 2: Convert to fraction form
    15,321.55/21,141.43 = 8,605.89/x
  3. Step 3: Cross multiply
    15,321.55x = 21,141.43 × 8,605.89
  4. Step 4: Simplify right side
    15,321.55x = 181,940,847.92
  5. Step 5: Solve for x
    x = 181,940,847.92/15,321.55
  6. Step 6: Final answer
    x = 11,874.83

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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.