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Finding the Fourth Proportional to 12,228.85, 16,875.89 and 6,639.85

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Solution

The fourth proportional to 12,228.85, 16,875.89 and 6,639.85 is: 9,163.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,228.85 : 16,875.89 = 6,639.85 : x
  2. Step 2: Convert to fraction form
    12,228.85/16,875.89 = 6,639.85/x
  3. Step 3: Cross multiply
    12,228.85x = 16,875.89 × 6,639.85
  4. Step 4: Simplify right side
    12,228.85x = 112,053,378.22
  5. Step 5: Solve for x
    x = 112,053,378.22/12,228.85
  6. Step 6: Final answer
    x = 9,163.03

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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.