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Finding the Fourth Proportional to 8,666.63, 11,959.65 and 4,889.90

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Solution

The fourth proportional to 8,666.63, 11,959.65 and 4,889.90 is: 6,747.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.63 : 11,959.65 = 4,889.90 : x
  2. Step 2: Convert to fraction form
    8,666.63/11,959.65 = 4,889.90/x
  3. Step 3: Cross multiply
    8,666.63x = 11,959.65 × 4,889.90
  4. Step 4: Simplify right side
    8,666.63x = 58,481,522.43
  5. Step 5: Solve for x
    x = 58,481,522.43/8,666.63
  6. Step 6: Final answer
    x = 6,747.90

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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.