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Finding the Fourth Proportional to 5,421.66, 8,131.63 and 1,723.40

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Solution

The fourth proportional to 5,421.66, 8,131.63 and 1,723.40 is: 2,584.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,421.66 : 8,131.63 = 1,723.40 : x
  2. Step 2: Convert to fraction form
    5,421.66/8,131.63 = 1,723.40/x
  3. Step 3: Cross multiply
    5,421.66x = 8,131.63 × 1,723.40
  4. Step 4: Simplify right side
    5,421.66x = 14,014,051.14
  5. Step 5: Solve for x
    x = 14,014,051.14/5,421.66
  6. Step 6: Final answer
    x = 2,584.83

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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.