Home / 5,215.36-7,197.38-2,857.50

Finding the Fourth Proportional to 5,215.36, 7,197.38 and 2,857.50

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Solution

The fourth proportional to 5,215.36, 7,197.38 and 2,857.50 is: 3,943.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.36 : 7,197.38 = 2,857.50 : x
  2. Step 2: Convert to fraction form
    5,215.36/7,197.38 = 2,857.50/x
  3. Step 3: Cross multiply
    5,215.36x = 7,197.38 × 2,857.50
  4. Step 4: Simplify right side
    5,215.36x = 20,566,515.20
  5. Step 5: Solve for x
    x = 20,566,515.20/5,215.36
  6. Step 6: Final answer
    x = 3,943.45

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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.