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Finding the Fourth Proportional to 8,652.55, 12,980.30 and 3,106.45

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Solution

The fourth proportional to 8,652.55, 12,980.30 and 3,106.45 is: 4,660.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,652.55 : 12,980.30 = 3,106.45 : x
  2. Step 2: Convert to fraction form
    8,652.55/12,980.30 = 3,106.45/x
  3. Step 3: Cross multiply
    8,652.55x = 12,980.30 × 3,106.45
  4. Step 4: Simplify right side
    8,652.55x = 40,322,671.10
  5. Step 5: Solve for x
    x = 40,322,671.10/8,652.55
  6. Step 6: Final answer
    x = 4,660.21

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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.