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Finding the Fourth Proportional to 8,664.79, 11,957.40 and 4,685.87

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Solution

The fourth proportional to 8,664.79, 11,957.40 and 4,685.87 is: 6,466.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,664.79 : 11,957.40 = 4,685.87 : x
  2. Step 2: Convert to fraction form
    8,664.79/11,957.40 = 4,685.87/x
  3. Step 3: Cross multiply
    8,664.79x = 11,957.40 × 4,685.87
  4. Step 4: Simplify right side
    8,664.79x = 56,030,821.94
  5. Step 5: Solve for x
    x = 56,030,821.94/8,664.79
  6. Step 6: Final answer
    x = 6,466.50

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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.