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Finding the Fourth Proportional to 8,666.56, 11,959.81 and 4,687.66

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Solution

The fourth proportional to 8,666.56, 11,959.81 and 4,687.66 is: 6,468.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.56 : 11,959.81 = 4,687.66 : x
  2. Step 2: Convert to fraction form
    8,666.56/11,959.81 = 4,687.66/x
  3. Step 3: Cross multiply
    8,666.56x = 11,959.81 × 4,687.66
  4. Step 4: Simplify right side
    8,666.56x = 56,063,522.94
  5. Step 5: Solve for x
    x = 56,063,522.94/8,666.56
  6. Step 6: Final answer
    x = 6,468.95

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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.