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Finding the Fourth Proportional to 9,766.80, 14,628.60 and 8,672.40

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Solution

The fourth proportional to 9,766.80, 14,628.60 and 8,672.40 is: 12,989.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,766.80 : 14,628.60 = 8,672.40 : x
  2. Step 2: Convert to fraction form
    9,766.80/14,628.60 = 8,672.40/x
  3. Step 3: Cross multiply
    9,766.80x = 14,628.60 × 8,672.40
  4. Step 4: Simplify right side
    9,766.80x = 126,865,070.64
  5. Step 5: Solve for x
    x = 126,865,070.64/9,766.80
  6. Step 6: Final answer
    x = 12,989.42

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1.5x scale

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.