Home / 20,129.72-27,776.62-11,174.91

Finding the Fourth Proportional to 20,129.72, 27,776.62 and 11,174.91

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Solution

The fourth proportional to 20,129.72, 27,776.62 and 11,174.91 is: 15,420.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.72 : 27,776.62 = 11,174.91 : x
  2. Step 2: Convert to fraction form
    20,129.72/27,776.62 = 11,174.91/x
  3. Step 3: Cross multiply
    20,129.72x = 27,776.62 × 11,174.91
  4. Step 4: Simplify right side
    20,129.72x = 310,401,294.65
  5. Step 5: Solve for x
    x = 310,401,294.65/20,129.72
  6. Step 6: Final answer
    x = 15,420.05

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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.