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Finding the Fourth Proportional to 14,148, 21,222 and 7,992.48

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Solution

The fourth proportional to 14,148, 21,222 and 7,992.48 is: 11,988.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,148 : 21,222 = 7,992.48 : x
  2. Step 2: Convert to fraction form
    14,148/21,222 = 7,992.48/x
  3. Step 3: Cross multiply
    14,148x = 21,222 × 7,992.48
  4. Step 4: Simplify right side
    14,148x = 169,616,410.56
  5. Step 5: Solve for x
    x = 169,616,410.56/14,148
  6. Step 6: Final answer
    x = 11,988.72

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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.