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Finding the Fourth Proportional to 18,622.74, 27,928.18 and 6,140.44

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Solution

The fourth proportional to 18,622.74, 27,928.18 and 6,140.44 is: 9,208.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,622.74 : 27,928.18 = 6,140.44 : x
  2. Step 2: Convert to fraction form
    18,622.74/27,928.18 = 6,140.44/x
  3. Step 3: Cross multiply
    18,622.74x = 27,928.18 × 6,140.44
  4. Step 4: Simplify right side
    18,622.74x = 171,491,313.60
  5. Step 5: Solve for x
    x = 171,491,313.60/18,622.74
  6. Step 6: Final answer
    x = 9,208.70

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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.