Home / 5,215.68-7,197.60-2,857.80

Finding the Fourth Proportional to 5,215.68, 7,197.60 and 2,857.80

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Solution

The fourth proportional to 5,215.68, 7,197.60 and 2,857.80 is: 3,943.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.68 : 7,197.60 = 2,857.80 : x
  2. Step 2: Convert to fraction form
    5,215.68/7,197.60 = 2,857.80/x
  3. Step 3: Cross multiply
    5,215.68x = 7,197.60 × 2,857.80
  4. Step 4: Simplify right side
    5,215.68x = 20,569,301.28
  5. Step 5: Solve for x
    x = 20,569,301.28/5,215.68
  6. Step 6: Final answer
    x = 3,943.74

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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.