Home / 13,109.28-19,664.64-8,521.44

Finding the Fourth Proportional to 13,109.28, 19,664.64 and 8,521.44

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Solution

The fourth proportional to 13,109.28, 19,664.64 and 8,521.44 is: 12,782.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,109.28 : 19,664.64 = 8,521.44 : x
  2. Step 2: Convert to fraction form
    13,109.28/19,664.64 = 8,521.44/x
  3. Step 3: Cross multiply
    13,109.28x = 19,664.64 × 8,521.44
  4. Step 4: Simplify right side
    13,109.28x = 167,571,049.88
  5. Step 5: Solve for x
    x = 167,571,049.88/13,109.28
  6. Step 6: Final answer
    x = 12,782.63

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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.