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Finding the Fourth Proportional to 14,618.18, 21,899.64 and 7,213.98

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Solution

The fourth proportional to 14,618.18, 21,899.64 and 7,213.98 is: 10,807.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,618.18 : 21,899.64 = 7,213.98 : x
  2. Step 2: Convert to fraction form
    14,618.18/21,899.64 = 7,213.98/x
  3. Step 3: Cross multiply
    14,618.18x = 21,899.64 × 7,213.98
  4. Step 4: Simplify right side
    14,618.18x = 157,983,564.97
  5. Step 5: Solve for x
    x = 157,983,564.97/14,618.18
  6. Step 6: Final answer
    x = 10,807.33

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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.