Home / 5,170.65-7,135.50-2,812.78

Finding the Fourth Proportional to 5,170.65, 7,135.50 and 2,812.78

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Solution

The fourth proportional to 5,170.65, 7,135.50 and 2,812.78 is: 3,881.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,170.65 : 7,135.50 = 2,812.78 : x
  2. Step 2: Convert to fraction form
    5,170.65/7,135.50 = 2,812.78/x
  3. Step 3: Cross multiply
    5,170.65x = 7,135.50 × 2,812.78
  4. Step 4: Simplify right side
    5,170.65x = 20,070,591.69
  5. Step 5: Solve for x
    x = 20,070,591.69/5,170.65
  6. Step 6: Final answer
    x = 3,881.64

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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.