Home / 15,104.30-20,843.21-8,390.36

Finding the Fourth Proportional to 15,104.30, 20,843.21 and 8,390.36

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Solution

The fourth proportional to 15,104.30, 20,843.21 and 8,390.36 is: 11,578.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,104.30 : 20,843.21 = 8,390.36 : x
  2. Step 2: Convert to fraction form
    15,104.30/20,843.21 = 8,390.36/x
  3. Step 3: Cross multiply
    15,104.30x = 20,843.21 × 8,390.36
  4. Step 4: Simplify right side
    15,104.30x = 174,882,035.46
  5. Step 5: Solve for x
    x = 174,882,035.46/15,104.30
  6. Step 6: Final answer
    x = 11,578.29

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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.