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Finding the Fourth Proportional to 21,958.77, 32,942.40 and 7,163.71

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Solution

The fourth proportional to 21,958.77, 32,942.40 and 7,163.71 is: 10,746.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,958.77 : 32,942.40 = 7,163.71 : x
  2. Step 2: Convert to fraction form
    21,958.77/32,942.40 = 7,163.71/x
  3. Step 3: Cross multiply
    21,958.77x = 32,942.40 × 7,163.71
  4. Step 4: Simplify right side
    21,958.77x = 235,989,800.30
  5. Step 5: Solve for x
    x = 235,989,800.30/21,958.77
  6. Step 6: Final answer
    x = 10,746.95

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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.