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Finding the Fourth Proportional to 18,619.68, 27,933.68 and 6,143.60

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Solution

The fourth proportional to 18,619.68, 27,933.68 and 6,143.60 is: 9,216.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,619.68 : 27,933.68 = 6,143.60 : x
  2. Step 2: Convert to fraction form
    18,619.68/27,933.68 = 6,143.60/x
  3. Step 3: Cross multiply
    18,619.68x = 27,933.68 × 6,143.60
  4. Step 4: Simplify right side
    18,619.68x = 171,613,356.45
  5. Step 5: Solve for x
    x = 171,613,356.45/18,619.68
  6. Step 6: Final answer
    x = 9,216.77

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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.