Home / 15,111.21-20,852.37-8,396.49

Finding the Fourth Proportional to 15,111.21, 20,852.37 and 8,396.49

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Solution

The fourth proportional to 15,111.21, 20,852.37 and 8,396.49 is: 11,586.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,111.21 : 20,852.37 = 8,396.49 : x
  2. Step 2: Convert to fraction form
    15,111.21/20,852.37 = 8,396.49/x
  3. Step 3: Cross multiply
    15,111.21x = 20,852.37 × 8,396.49
  4. Step 4: Simplify right side
    15,111.21x = 175,086,716.18
  5. Step 5: Solve for x
    x = 175,086,716.18/15,111.21
  6. Step 6: Final answer
    x = 11,586.55

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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.