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Finding the Fourth Proportional to 8,666.08, 11,959.60 and 4,940

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Solution

The fourth proportional to 8,666.08, 11,959.60 and 4,940 is: 6,817.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.08 : 11,959.60 = 4,940 : x
  2. Step 2: Convert to fraction form
    8,666.08/11,959.60 = 4,940/x
  3. Step 3: Cross multiply
    8,666.08x = 11,959.60 × 4,940
  4. Step 4: Simplify right side
    8,666.08x = 59,080,424
  5. Step 5: Solve for x
    x = 59,080,424/8,666.08
  6. Step 6: Final answer
    x = 6,817.43

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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.