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Finding the Fourth Proportional to 7,163.56, 9,881.88 and 4,178.30

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Solution

The fourth proportional to 7,163.56, 9,881.88 and 4,178.30 is: 5,763.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,163.56 : 9,881.88 = 4,178.30 : x
  2. Step 2: Convert to fraction form
    7,163.56/9,881.88 = 4,178.30/x
  3. Step 3: Cross multiply
    7,163.56x = 9,881.88 × 4,178.30
  4. Step 4: Simplify right side
    7,163.56x = 41,289,459.20
  5. Step 5: Solve for x
    x = 41,289,459.20/7,163.56
  6. Step 6: Final answer
    x = 5,763.82

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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.