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Finding the Fourth Proportional to 8,664.80, 11,957.47 and 4,685.90

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Solution

The fourth proportional to 8,664.80, 11,957.47 and 4,685.90 is: 6,466.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,664.80 : 11,957.47 = 4,685.90 : x
  2. Step 2: Convert to fraction form
    8,664.80/11,957.47 = 4,685.90/x
  3. Step 3: Cross multiply
    8,664.80x = 11,957.47 × 4,685.90
  4. Step 4: Simplify right side
    8,664.80x = 56,031,508.67
  5. Step 5: Solve for x
    x = 56,031,508.67/8,664.80
  6. Step 6: Final answer
    x = 6,466.57

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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.