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Finding the Fourth Proportional to 18,693.64, 28,045.76 and 7,608.28

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Solution

The fourth proportional to 18,693.64, 28,045.76 and 7,608.28 is: 11,414.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,693.64 : 28,045.76 = 7,608.28 : x
  2. Step 2: Convert to fraction form
    18,693.64/28,045.76 = 7,608.28/x
  3. Step 3: Cross multiply
    18,693.64x = 28,045.76 × 7,608.28
  4. Step 4: Simplify right side
    18,693.64x = 213,379,956.85
  5. Step 5: Solve for x
    x = 213,379,956.85/18,693.64
  6. Step 6: Final answer
    x = 11,414.58

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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.