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Finding the Fourth Proportional to 8,709.92, 12,019.79 and 4,731.09

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Solution

The fourth proportional to 8,709.92, 12,019.79 and 4,731.09 is: 6,528.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,709.92 : 12,019.79 = 4,731.09 : x
  2. Step 2: Convert to fraction form
    8,709.92/12,019.79 = 4,731.09/x
  3. Step 3: Cross multiply
    8,709.92x = 12,019.79 × 4,731.09
  4. Step 4: Simplify right side
    8,709.92x = 56,866,684.62
  5. Step 5: Solve for x
    x = 56,866,684.62/8,709.92
  6. Step 6: Final answer
    x = 6,528.96

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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.