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Finding the Fourth Proportional to 18,619.42, 27,929.49 and 6,930.28

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Solution

The fourth proportional to 18,619.42, 27,929.49 and 6,930.28 is: 10,395.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,619.42 : 27,929.49 = 6,930.28 : x
  2. Step 2: Convert to fraction form
    18,619.42/27,929.49 = 6,930.28/x
  3. Step 3: Cross multiply
    18,619.42x = 27,929.49 × 6,930.28
  4. Step 4: Simplify right side
    18,619.42x = 193,559,185.96
  5. Step 5: Solve for x
    x = 193,559,185.96/18,619.42
  6. Step 6: Final answer
    x = 10,395.55

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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.