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Finding the Fourth Proportional to 8,684.60, 11,984.80 and 4,705.76

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Solution

The fourth proportional to 8,684.60, 11,984.80 and 4,705.76 is: 6,493.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,684.60 : 11,984.80 = 4,705.76 : x
  2. Step 2: Convert to fraction form
    8,684.60/11,984.80 = 4,705.76/x
  3. Step 3: Cross multiply
    8,684.60x = 11,984.80 × 4,705.76
  4. Step 4: Simplify right side
    8,684.60x = 56,397,592.45
  5. Step 5: Solve for x
    x = 56,397,592.45/8,684.60
  6. Step 6: Final answer
    x = 6,493.98

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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.