Home / 8,660.71-12,989.64-3,113.02

Finding the Fourth Proportional to 8,660.71, 12,989.64 and 3,113.02

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Solution

The fourth proportional to 8,660.71, 12,989.64 and 3,113.02 is: 4,669.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,660.71 : 12,989.64 = 3,113.02 : x
  2. Step 2: Convert to fraction form
    8,660.71/12,989.64 = 3,113.02/x
  3. Step 3: Cross multiply
    8,660.71x = 12,989.64 × 3,113.02
  4. Step 4: Simplify right side
    8,660.71x = 40,436,976.64
  5. Step 5: Solve for x
    x = 40,436,976.64/8,660.71
  6. Step 6: Final answer
    x = 4,669.02

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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.