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Finding the Fourth Proportional to 12,660.69, 18,992.58 and 5,270.16

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Solution

The fourth proportional to 12,660.69, 18,992.58 and 5,270.16 is: 7,905.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,660.69 : 18,992.58 = 5,270.16 : x
  2. Step 2: Convert to fraction form
    12,660.69/18,992.58 = 5,270.16/x
  3. Step 3: Cross multiply
    12,660.69x = 18,992.58 × 5,270.16
  4. Step 4: Simplify right side
    12,660.69x = 100,093,935.41
  5. Step 5: Solve for x
    x = 100,093,935.41/12,660.69
  6. Step 6: Final answer
    x = 7,905.88

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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.