Home / 13,655.75-18,845.30-7,687.64

Finding the Fourth Proportional to 13,655.75, 18,845.30 and 7,687.64

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Solution

The fourth proportional to 13,655.75, 18,845.30 and 7,687.64 is: 10,609.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,655.75 : 18,845.30 = 7,687.64 : x
  2. Step 2: Convert to fraction form
    13,655.75/18,845.30 = 7,687.64/x
  3. Step 3: Cross multiply
    13,655.75x = 18,845.30 × 7,687.64
  4. Step 4: Simplify right side
    13,655.75x = 144,875,796.54
  5. Step 5: Solve for x
    x = 144,875,796.54/13,655.75
  6. Step 6: Final answer
    x = 10,609.14

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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.