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Finding the Fourth Proportional to 13,655.44, 18,844.28 and 7,687.08

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Solution

The fourth proportional to 13,655.44, 18,844.28 and 7,687.08 is: 10,608.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,655.44 : 18,844.28 = 7,687.08 : x
  2. Step 2: Convert to fraction form
    13,655.44/18,844.28 = 7,687.08/x
  3. Step 3: Cross multiply
    13,655.44x = 18,844.28 × 7,687.08
  4. Step 4: Simplify right side
    13,655.44x = 144,857,487.90
  5. Step 5: Solve for x
    x = 144,857,487.90/13,655.44
  6. Step 6: Final answer
    x = 10,608.04

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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.