Home / 5,215.48-7,197.32-2,857.57

Finding the Fourth Proportional to 5,215.48, 7,197.32 and 2,857.57

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Solution

The fourth proportional to 5,215.48, 7,197.32 and 2,857.57 is: 3,943.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.48 : 7,197.32 = 2,857.57 : x
  2. Step 2: Convert to fraction form
    5,215.48/7,197.32 = 2,857.57/x
  3. Step 3: Cross multiply
    5,215.48x = 7,197.32 × 2,857.57
  4. Step 4: Simplify right side
    5,215.48x = 20,566,834.86
  5. Step 5: Solve for x
    x = 20,566,834.86/5,215.48
  6. Step 6: Final answer
    x = 3,943.42

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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.