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Finding the Fourth Proportional to 14,279.56, 21,421.62 and 4,917.27

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Solution

The fourth proportional to 14,279.56, 21,421.62 and 4,917.27 is: 7,376.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,279.56 : 21,421.62 = 4,917.27 : x
  2. Step 2: Convert to fraction form
    14,279.56/21,421.62 = 4,917.27/x
  3. Step 3: Cross multiply
    14,279.56x = 21,421.62 × 4,917.27
  4. Step 4: Simplify right side
    14,279.56x = 105,335,889.38
  5. Step 5: Solve for x
    x = 105,335,889.38/14,279.56
  6. Step 6: Final answer
    x = 7,376.69

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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.