Home / 15,103.96-20,843.75-8,390.23

Finding the Fourth Proportional to 15,103.96, 20,843.75 and 8,390.23

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Solution

The fourth proportional to 15,103.96, 20,843.75 and 8,390.23 is: 11,578.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,103.96 : 20,843.75 = 8,390.23 : x
  2. Step 2: Convert to fraction form
    15,103.96/20,843.75 = 8,390.23/x
  3. Step 3: Cross multiply
    15,103.96x = 20,843.75 × 8,390.23
  4. Step 4: Simplify right side
    15,103.96x = 174,883,825.43
  5. Step 5: Solve for x
    x = 174,883,825.43/15,103.96
  6. Step 6: Final answer
    x = 11,578.68

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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.