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Finding the Fourth Proportional to 8,620.29, 12,913.43 and 6,762.15

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Solution

The fourth proportional to 8,620.29, 12,913.43 and 6,762.15 is: 10,129.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,620.29 : 12,913.43 = 6,762.15 : x
  2. Step 2: Convert to fraction form
    8,620.29/12,913.43 = 6,762.15/x
  3. Step 3: Cross multiply
    8,620.29x = 12,913.43 × 6,762.15
  4. Step 4: Simplify right side
    8,620.29x = 87,322,516.86
  5. Step 5: Solve for x
    x = 87,322,516.86/8,620.29
  6. Step 6: Final answer
    x = 10,129.88

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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.