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Finding the Fourth Proportional to 14,374.56, 21,561.90 and 3,985.56

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Solution

The fourth proportional to 14,374.56, 21,561.90 and 3,985.56 is: 5,978.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,374.56 : 21,561.90 = 3,985.56 : x
  2. Step 2: Convert to fraction form
    14,374.56/21,561.90 = 3,985.56/x
  3. Step 3: Cross multiply
    14,374.56x = 21,561.90 × 3,985.56
  4. Step 4: Simplify right side
    14,374.56x = 85,936,246.16
  5. Step 5: Solve for x
    x = 85,936,246.16/14,374.56
  6. Step 6: Final answer
    x = 5,978.36

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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.