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Finding the Fourth Proportional to 8,666.47, 11,959.73 and 4,687.58

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Solution

The fourth proportional to 8,666.47, 11,959.73 and 4,687.58 is: 6,468.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.47 : 11,959.73 = 4,687.58 : x
  2. Step 2: Convert to fraction form
    8,666.47/11,959.73 = 4,687.58/x
  3. Step 3: Cross multiply
    8,666.47x = 11,959.73 × 4,687.58
  4. Step 4: Simplify right side
    8,666.47x = 56,062,167.72
  5. Step 5: Solve for x
    x = 56,062,167.72/8,666.47
  6. Step 6: Final answer
    x = 6,468.86

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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.