Home / 20,129.24-27,778.85-11,176.31

Finding the Fourth Proportional to 20,129.24, 27,778.85 and 11,176.31

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Solution

The fourth proportional to 20,129.24, 27,778.85 and 11,176.31 is: 15,423.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.24 : 27,778.85 = 11,176.31 : x
  2. Step 2: Convert to fraction form
    20,129.24/27,778.85 = 11,176.31/x
  3. Step 3: Cross multiply
    20,129.24x = 27,778.85 × 11,176.31
  4. Step 4: Simplify right side
    20,129.24x = 310,465,094.52
  5. Step 5: Solve for x
    x = 310,465,094.52/20,129.24
  6. Step 6: Final answer
    x = 15,423.59

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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.