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Finding the Fourth Proportional to 18,428.88, 27,644.16 and 5,283.12

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Solution

The fourth proportional to 18,428.88, 27,644.16 and 5,283.12 is: 7,924.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,428.88 : 27,644.16 = 5,283.12 : x
  2. Step 2: Convert to fraction form
    18,428.88/27,644.16 = 5,283.12/x
  3. Step 3: Cross multiply
    18,428.88x = 27,644.16 × 5,283.12
  4. Step 4: Simplify right side
    18,428.88x = 146,047,414.58
  5. Step 5: Solve for x
    x = 146,047,414.58/18,428.88
  6. Step 6: Final answer
    x = 7,924.92

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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.