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Finding the Fourth Proportional to 13,704.64, 18,911.92 and 7,655.04

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Solution

The fourth proportional to 13,704.64, 18,911.92 and 7,655.04 is: 10,563.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,704.64 : 18,911.92 = 7,655.04 : x
  2. Step 2: Convert to fraction form
    13,704.64/18,911.92 = 7,655.04/x
  3. Step 3: Cross multiply
    13,704.64x = 18,911.92 × 7,655.04
  4. Step 4: Simplify right side
    13,704.64x = 144,771,504.08
  5. Step 5: Solve for x
    x = 144,771,504.08/13,704.64
  6. Step 6: Final answer
    x = 10,563.69

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1.5x scale

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.