Home / 10,660.80-15,991.28-4,085.41

Finding the Fourth Proportional to 10,660.80, 15,991.28 and 4,085.41

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Solution

The fourth proportional to 10,660.80, 15,991.28 and 4,085.41 is: 6,128.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,660.80 : 15,991.28 = 4,085.41 : x
  2. Step 2: Convert to fraction form
    10,660.80/15,991.28 = 4,085.41/x
  3. Step 3: Cross multiply
    10,660.80x = 15,991.28 × 4,085.41
  4. Step 4: Simplify right side
    10,660.80x = 65,330,914.80
  5. Step 5: Solve for x
    x = 65,330,914.80/10,660.80
  6. Step 6: Final answer
    x = 6,128.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.