Home / 5,215.61-7,197.50-2,857.70

Finding the Fourth Proportional to 5,215.61, 7,197.50 and 2,857.70

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Solution

The fourth proportional to 5,215.61, 7,197.50 and 2,857.70 is: 3,943.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.61 : 7,197.50 = 2,857.70 : x
  2. Step 2: Convert to fraction form
    5,215.61/7,197.50 = 2,857.70/x
  3. Step 3: Cross multiply
    5,215.61x = 7,197.50 × 2,857.70
  4. Step 4: Simplify right side
    5,215.61x = 20,568,245.47
  5. Step 5: Solve for x
    x = 20,568,245.47/5,215.61
  6. Step 6: Final answer
    x = 3,943.60

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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.