Home / 15,660.41-21,611.21-8,586.81

Finding the Fourth Proportional to 15,660.41, 21,611.21 and 8,586.81

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Solution

The fourth proportional to 15,660.41, 21,611.21 and 8,586.81 is: 11,849.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,660.41 : 21,611.21 = 8,586.81 : x
  2. Step 2: Convert to fraction form
    15,660.41/21,611.21 = 8,586.81/x
  3. Step 3: Cross multiply
    15,660.41x = 21,611.21 × 8,586.81
  4. Step 4: Simplify right side
    15,660.41x = 185,571,311.21
  5. Step 5: Solve for x
    x = 185,571,311.21/15,660.41
  6. Step 6: Final answer
    x = 11,849.71

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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.