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Finding the Fourth Proportional to 18,951.64, 28,396.17 and 11,533.66

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Solution

The fourth proportional to 18,951.64, 28,396.17 and 11,533.66 is: 17,281.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,951.64 : 28,396.17 = 11,533.66 : x
  2. Step 2: Convert to fraction form
    18,951.64/28,396.17 = 11,533.66/x
  3. Step 3: Cross multiply
    18,951.64x = 28,396.17 × 11,533.66
  4. Step 4: Simplify right side
    18,951.64x = 327,511,699.09
  5. Step 5: Solve for x
    x = 327,511,699.09/18,951.64
  6. Step 6: Final answer
    x = 17,281.45

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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.