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Finding the Fourth Proportional to 10,989.52, 16,480.86 and 3,968.64

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Solution

The fourth proportional to 10,989.52, 16,480.86 and 3,968.64 is: 5,951.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,989.52 : 16,480.86 = 3,968.64 : x
  2. Step 2: Convert to fraction form
    10,989.52/16,480.86 = 3,968.64/x
  3. Step 3: Cross multiply
    10,989.52x = 16,480.86 × 3,968.64
  4. Step 4: Simplify right side
    10,989.52x = 65,406,600.23
  5. Step 5: Solve for x
    x = 65,406,600.23/10,989.52
  6. Step 6: Final answer
    x = 5,951.72

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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.