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Finding the Fourth Proportional to 13,080.64, 19,620.96 and 8,706.64

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Solution

The fourth proportional to 13,080.64, 19,620.96 and 8,706.64 is: 13,059.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,080.64 : 19,620.96 = 8,706.64 : x
  2. Step 2: Convert to fraction form
    13,080.64/19,620.96 = 8,706.64/x
  3. Step 3: Cross multiply
    13,080.64x = 19,620.96 × 8,706.64
  4. Step 4: Simplify right side
    13,080.64x = 170,832,635.17
  5. Step 5: Solve for x
    x = 170,832,635.17/13,080.64
  6. Step 6: Final answer
    x = 13,059.96

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1.5x scale

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.