Home / 5,215.14-7,197.12-2,857.23

Finding the Fourth Proportional to 5,215.14, 7,197.12 and 2,857.23

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Solution

The fourth proportional to 5,215.14, 7,197.12 and 2,857.23 is: 3,943.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.14 : 7,197.12 = 2,857.23 : x
  2. Step 2: Convert to fraction form
    5,215.14/7,197.12 = 2,857.23/x
  3. Step 3: Cross multiply
    5,215.14x = 7,197.12 × 2,857.23
  4. Step 4: Simplify right side
    5,215.14x = 20,563,827.18
  5. Step 5: Solve for x
    x = 20,563,827.18/5,215.14
  6. Step 6: Final answer
    x = 3,943.10

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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.