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Finding the Fourth Proportional to 7,788.63, 11,663.87 and 7,039.79

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Solution

The fourth proportional to 7,788.63, 11,663.87 and 7,039.79 is: 10,542.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,788.63 : 11,663.87 = 7,039.79 : x
  2. Step 2: Convert to fraction form
    7,788.63/11,663.87 = 7,039.79/x
  3. Step 3: Cross multiply
    7,788.63x = 11,663.87 × 7,039.79
  4. Step 4: Simplify right side
    7,788.63x = 82,111,101.87
  5. Step 5: Solve for x
    x = 82,111,101.87/7,788.63
  6. Step 6: Final answer
    x = 10,542.43

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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.