Home / 8,664.68-12,981.38-3,988.60

Finding the Fourth Proportional to 8,664.68, 12,981.38 and 3,988.60

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Solution

The fourth proportional to 8,664.68, 12,981.38 and 3,988.60 is: 5,975.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,664.68 : 12,981.38 = 3,988.60 : x
  2. Step 2: Convert to fraction form
    8,664.68/12,981.38 = 3,988.60/x
  3. Step 3: Cross multiply
    8,664.68x = 12,981.38 × 3,988.60
  4. Step 4: Simplify right side
    8,664.68x = 51,777,532.27
  5. Step 5: Solve for x
    x = 51,777,532.27/8,664.68
  6. Step 6: Final answer
    x = 5,975.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.