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Finding the Fourth Proportional to 12,228.75, 16,875.68 and 6,639.75

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Solution

The fourth proportional to 12,228.75, 16,875.68 and 6,639.75 is: 9,162.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,228.75 : 16,875.68 = 6,639.75 : x
  2. Step 2: Convert to fraction form
    12,228.75/16,875.68 = 6,639.75/x
  3. Step 3: Cross multiply
    12,228.75x = 16,875.68 × 6,639.75
  4. Step 4: Simplify right side
    12,228.75x = 112,050,263.08
  5. Step 5: Solve for x
    x = 112,050,263.08/12,228.75
  6. Step 6: Final answer
    x = 9,162.86

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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.