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Finding the Fourth Proportional to 18,971.00, 28,451.34 and 5,643.96

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Solution

The fourth proportional to 18,971.00, 28,451.34 and 5,643.96 is: 8,464.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,971.00 : 28,451.34 = 5,643.96 : x
  2. Step 2: Convert to fraction form
    18,971.00/28,451.34 = 5,643.96/x
  3. Step 3: Cross multiply
    18,971.00x = 28,451.34 × 5,643.96
  4. Step 4: Simplify right side
    18,971.00x = 160,578,224.91
  5. Step 5: Solve for x
    x = 160,578,224.91/18,971.00
  6. Step 6: Final answer
    x = 8,464.41

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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.