Home / 5,145.12-7,717.68-2,829.60

Finding the Fourth Proportional to 5,145.12, 7,717.68 and 2,829.60

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Solution

The fourth proportional to 5,145.12, 7,717.68 and 2,829.60 is: 4,244.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.12 : 7,717.68 = 2,829.60 : x
  2. Step 2: Convert to fraction form
    5,145.12/7,717.68 = 2,829.60/x
  3. Step 3: Cross multiply
    5,145.12x = 7,717.68 × 2,829.60
  4. Step 4: Simplify right side
    5,145.12x = 21,837,947.33
  5. Step 5: Solve for x
    x = 21,837,947.33/5,145.12
  6. Step 6: Final answer
    x = 4,244.40

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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.