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Finding the Fourth Proportional to 14,122.91, 19,489.86 and 7,749.81

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Solution

The fourth proportional to 14,122.91, 19,489.86 and 7,749.81 is: 10,694.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,122.91 : 19,489.86 = 7,749.81 : x
  2. Step 2: Convert to fraction form
    14,122.91/19,489.86 = 7,749.81/x
  3. Step 3: Cross multiply
    14,122.91x = 19,489.86 × 7,749.81
  4. Step 4: Simplify right side
    14,122.91x = 151,042,711.93
  5. Step 5: Solve for x
    x = 151,042,711.93/14,122.91
  6. Step 6: Final answer
    x = 10,694.88

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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.