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Finding the Fourth Proportional to 8,628.92, 12,931.07 and 6,865.99

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Solution

The fourth proportional to 8,628.92, 12,931.07 and 6,865.99 is: 10,289.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,628.92 : 12,931.07 = 6,865.99 : x
  2. Step 2: Convert to fraction form
    8,628.92/12,931.07 = 6,865.99/x
  3. Step 3: Cross multiply
    8,628.92x = 12,931.07 × 6,865.99
  4. Step 4: Simplify right side
    8,628.92x = 88,784,597.31
  5. Step 5: Solve for x
    x = 88,784,597.31/8,628.92
  6. Step 6: Final answer
    x = 10,289.19

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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.