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Finding the Fourth Proportional to 8,666.99, 11,960.42 and 4,688.12

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Solution

The fourth proportional to 8,666.99, 11,960.42 and 4,688.12 is: 6,469.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.99 : 11,960.42 = 4,688.12 : x
  2. Step 2: Convert to fraction form
    8,666.99/11,960.42 = 4,688.12/x
  3. Step 3: Cross multiply
    8,666.99x = 11,960.42 × 4,688.12
  4. Step 4: Simplify right side
    8,666.99x = 56,071,800.97
  5. Step 5: Solve for x
    x = 56,071,800.97/8,666.99
  6. Step 6: Final answer
    x = 6,469.58

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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.