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Finding the Fourth Proportional to 8,639.39, 12,939.93 and 7,052.00

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Solution

The fourth proportional to 8,639.39, 12,939.93 and 7,052.00 is: 10,562.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.39 : 12,939.93 = 7,052.00 : x
  2. Step 2: Convert to fraction form
    8,639.39/12,939.93 = 7,052.00/x
  3. Step 3: Cross multiply
    8,639.39x = 12,939.93 × 7,052.00
  4. Step 4: Simplify right side
    8,639.39x = 91,252,321.66
  5. Step 5: Solve for x
    x = 91,252,321.66/8,639.39
  6. Step 6: Final answer
    x = 10,562.35

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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.