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Finding the Fourth Proportional to 7,749.81, 11,666.89 and 7,060.91

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Solution

The fourth proportional to 7,749.81, 11,666.89 and 7,060.91 is: 10,629.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,749.81 : 11,666.89 = 7,060.91 : x
  2. Step 2: Convert to fraction form
    7,749.81/11,666.89 = 7,060.91/x
  3. Step 3: Cross multiply
    7,749.81x = 11,666.89 × 7,060.91
  4. Step 4: Simplify right side
    7,749.81x = 82,378,860.27
  5. Step 5: Solve for x
    x = 82,378,860.27/7,749.81
  6. Step 6: Final answer
    x = 10,629.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.