Home / 13,818.72-20,728.79-3,959.45

Finding the Fourth Proportional to 13,818.72, 20,728.79 and 3,959.45

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Solution

The fourth proportional to 13,818.72, 20,728.79 and 3,959.45 is: 5,939.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,818.72 : 20,728.79 = 3,959.45 : x
  2. Step 2: Convert to fraction form
    13,818.72/20,728.79 = 3,959.45/x
  3. Step 3: Cross multiply
    13,818.72x = 20,728.79 × 3,959.45
  4. Step 4: Simplify right side
    13,818.72x = 82,074,484.12
  5. Step 5: Solve for x
    x = 82,074,484.12/13,818.72
  6. Step 6: Final answer
    x = 5,939.37

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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.