Home / 5,215.21-7,196.99-2,857.35

Finding the Fourth Proportional to 5,215.21, 7,196.99 and 2,857.35

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Solution

The fourth proportional to 5,215.21, 7,196.99 and 2,857.35 is: 3,943.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.21 : 7,196.99 = 2,857.35 : x
  2. Step 2: Convert to fraction form
    5,215.21/7,196.99 = 2,857.35/x
  3. Step 3: Cross multiply
    5,215.21x = 7,196.99 × 2,857.35
  4. Step 4: Simplify right side
    5,215.21x = 20,564,319.38
  5. Step 5: Solve for x
    x = 20,564,319.38/5,215.21
  6. Step 6: Final answer
    x = 3,943.14

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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.