Home / 13,321.38-19,971.72-8,631.48

Finding the Fourth Proportional to 13,321.38, 19,971.72 and 8,631.48

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Solution

The fourth proportional to 13,321.38, 19,971.72 and 8,631.48 is: 12,940.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,321.38 : 19,971.72 = 8,631.48 : x
  2. Step 2: Convert to fraction form
    13,321.38/19,971.72 = 8,631.48/x
  3. Step 3: Cross multiply
    13,321.38x = 19,971.72 × 8,631.48
  4. Step 4: Simplify right side
    13,321.38x = 172,385,501.75
  5. Step 5: Solve for x
    x = 172,385,501.75/13,321.38
  6. Step 6: Final answer
    x = 12,940.51

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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.