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Finding the Fourth Proportional to 8,428.86, 12,623.58 and 6,662.00

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Solution

The fourth proportional to 8,428.86, 12,623.58 and 6,662.00 is: 9,977.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,428.86 : 12,623.58 = 6,662.00 : x
  2. Step 2: Convert to fraction form
    8,428.86/12,623.58 = 6,662.00/x
  3. Step 3: Cross multiply
    8,428.86x = 12,623.58 × 6,662.00
  4. Step 4: Simplify right side
    8,428.86x = 84,098,321.52
  5. Step 5: Solve for x
    x = 84,098,321.52/8,428.86
  6. Step 6: Final answer
    x = 9,977.43

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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.