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Finding the Fourth Proportional to 5,163.45, 7,128.98 and 3,966.29

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Solution

The fourth proportional to 5,163.45, 7,128.98 and 3,966.29 is: 5,476.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,163.45 : 7,128.98 = 3,966.29 : x
  2. Step 2: Convert to fraction form
    5,163.45/7,128.98 = 3,966.29/x
  3. Step 3: Cross multiply
    5,163.45x = 7,128.98 × 3,966.29
  4. Step 4: Simplify right side
    5,163.45x = 28,275,602.08
  5. Step 5: Solve for x
    x = 28,275,602.08/5,163.45
  6. Step 6: Final answer
    x = 5,476.11

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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.