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Finding the Fourth Proportional to 18,655.47, 27,987.39 and 9,896.54

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Solution

The fourth proportional to 18,655.47, 27,987.39 and 9,896.54 is: 14,847.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,655.47 : 27,987.39 = 9,896.54 : x
  2. Step 2: Convert to fraction form
    18,655.47/27,987.39 = 9,896.54/x
  3. Step 3: Cross multiply
    18,655.47x = 27,987.39 × 9,896.54
  4. Step 4: Simplify right side
    18,655.47x = 276,978,184.69
  5. Step 5: Solve for x
    x = 276,978,184.69/18,655.47
  6. Step 6: Final answer
    x = 14,847.02

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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.