Home / 15,129.26-20,878.88-8,323.56

Finding the Fourth Proportional to 15,129.26, 20,878.88 and 8,323.56

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Solution

The fourth proportional to 15,129.26, 20,878.88 and 8,323.56 is: 11,486.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,129.26 : 20,878.88 = 8,323.56 : x
  2. Step 2: Convert to fraction form
    15,129.26/20,878.88 = 8,323.56/x
  3. Step 3: Cross multiply
    15,129.26x = 20,878.88 × 8,323.56
  4. Step 4: Simplify right side
    15,129.26x = 173,786,580.50
  5. Step 5: Solve for x
    x = 173,786,580.50/15,129.26
  6. Step 6: Final answer
    x = 11,486.79

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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.