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Finding the Fourth Proportional to 18,780.24, 28,160.64 and 6,932.64

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Solution

The fourth proportional to 18,780.24, 28,160.64 and 6,932.64 is: 10,395.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,780.24 : 28,160.64 = 6,932.64 : x
  2. Step 2: Convert to fraction form
    18,780.24/28,160.64 = 6,932.64/x
  3. Step 3: Cross multiply
    18,780.24x = 28,160.64 × 6,932.64
  4. Step 4: Simplify right side
    18,780.24x = 195,227,579.29
  5. Step 5: Solve for x
    x = 195,227,579.29/18,780.24
  6. Step 6: Final answer
    x = 10,395.37

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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.