Home / 5,420.16-8,127.36-2,133.12

Finding the Fourth Proportional to 5,420.16, 8,127.36 and 2,133.12

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Solution

The fourth proportional to 5,420.16, 8,127.36 and 2,133.12 is: 3,198.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.16 : 8,127.36 = 2,133.12 : x
  2. Step 2: Convert to fraction form
    5,420.16/8,127.36 = 2,133.12/x
  3. Step 3: Cross multiply
    5,420.16x = 8,127.36 × 2,133.12
  4. Step 4: Simplify right side
    5,420.16x = 17,336,634.16
  5. Step 5: Solve for x
    x = 17,336,634.16/5,420.16
  6. Step 6: Final answer
    x = 3,198.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.