Home / 11,147.28-16,720.12-4,571.68

Finding the Fourth Proportional to 11,147.28, 16,720.12 and 4,571.68

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Solution

The fourth proportional to 11,147.28, 16,720.12 and 4,571.68 is: 6,857.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,147.28 : 16,720.12 = 4,571.68 : x
  2. Step 2: Convert to fraction form
    11,147.28/16,720.12 = 4,571.68/x
  3. Step 3: Cross multiply
    11,147.28x = 16,720.12 × 4,571.68
  4. Step 4: Simplify right side
    11,147.28x = 76,439,038.20
  5. Step 5: Solve for x
    x = 76,439,038.20/11,147.28
  6. Step 6: Final answer
    x = 6,857.19

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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.