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Finding the Fourth Proportional to 12,261.60, 16,920.50 and 6,672.60

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Solution

The fourth proportional to 12,261.60, 16,920.50 and 6,672.60 is: 9,207.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,261.60 : 16,920.50 = 6,672.60 : x
  2. Step 2: Convert to fraction form
    12,261.60/16,920.50 = 6,672.60/x
  3. Step 3: Cross multiply
    12,261.60x = 16,920.50 × 6,672.60
  4. Step 4: Simplify right side
    12,261.60x = 112,903,694.94
  5. Step 5: Solve for x
    x = 112,903,694.94/12,261.60
  6. Step 6: Final answer
    x = 9,207.91

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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.