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Finding the Fourth Proportional to 12,228.88, 16,875.84 and 6,639.84

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Solution

The fourth proportional to 12,228.88, 16,875.84 and 6,639.84 is: 9,162.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,228.88 : 16,875.84 = 6,639.84 : x
  2. Step 2: Convert to fraction form
    12,228.88/16,875.84 = 6,639.84/x
  3. Step 3: Cross multiply
    12,228.88x = 16,875.84 × 6,639.84
  4. Step 4: Simplify right side
    12,228.88x = 112,052,877.47
  5. Step 5: Solve for x
    x = 112,052,877.47/12,228.88
  6. Step 6: Final answer
    x = 9,162.97

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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.