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Finding the Fourth Proportional to 8,707.64, 12,022.62 and 6,687.68

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Solution

The fourth proportional to 8,707.64, 12,022.62 and 6,687.68 is: 9,233.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,707.64 : 12,022.62 = 6,687.68 : x
  2. Step 2: Convert to fraction form
    8,707.64/12,022.62 = 6,687.68/x
  3. Step 3: Cross multiply
    8,707.64x = 12,022.62 × 6,687.68
  4. Step 4: Simplify right side
    8,707.64x = 80,403,435.32
  5. Step 5: Solve for x
    x = 80,403,435.32/8,707.64
  6. Step 6: Final answer
    x = 9,233.67

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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.