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Finding the Fourth Proportional to 8,455.14, 11,660.49 and 7,043.49

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Solution

The fourth proportional to 8,455.14, 11,660.49 and 7,043.49 is: 9,713.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,455.14 : 11,660.49 = 7,043.49 : x
  2. Step 2: Convert to fraction form
    8,455.14/11,660.49 = 7,043.49/x
  3. Step 3: Cross multiply
    8,455.14x = 11,660.49 × 7,043.49
  4. Step 4: Simplify right side
    8,455.14x = 82,130,544.71
  5. Step 5: Solve for x
    x = 82,130,544.71/8,455.14
  6. Step 6: Final answer
    x = 9,713.68

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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.