Home / 13,161.28-19,728.62-5,669.72

Finding the Fourth Proportional to 13,161.28, 19,728.62 and 5,669.72

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Solution

The fourth proportional to 13,161.28, 19,728.62 and 5,669.72 is: 8,498.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,161.28 : 19,728.62 = 5,669.72 : x
  2. Step 2: Convert to fraction form
    13,161.28/19,728.62 = 5,669.72/x
  3. Step 3: Cross multiply
    13,161.28x = 19,728.62 × 5,669.72
  4. Step 4: Simplify right side
    13,161.28x = 111,855,772.36
  5. Step 5: Solve for x
    x = 111,855,772.36/13,161.28
  6. Step 6: Final answer
    x = 8,498.85

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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.